ALBERT

Description:    A new method of an analysis of variances was developed for studying n -particle correlations of quasirapidities in nucleus-nucleus collisions for a large constant number n of particles. Formulas that generalize the results of the respective analysis to various values of n were derived. Calculations on the basis of simple models indicate that the method is applicable, at least for n ≥ 100. Quasirapidity correlations statistically significant at a level of 36 standard deviations were discovered in collisions between gold nuclei and track-emulsion nuclei at an energy of 10.6 GeV per nucleon. The experimental data obtained in our present study are contrasted against the theory of nucleus-nucleus collisions. Content Type Journal Article Category Elementary Particles and Fields Pages 1014-1018 DOI 10.1134/S1063778812040059 Authors K. G. Gulamov, Physical-Technical Institute, Fizika-Solntse Research and Production Association, Uzbek Academy of Sciences, ul. Mavlyanova 2b, Tashkent, 700084 Republic of Uzbekistan S. I. Zhokhova, Physical-Technical Institute, Fizika-Solntse Research and Production Association, Uzbek Academy of Sciences, ul. Mavlyanova 2b, Tashkent, 700084 Republic of Uzbekistan V. V. Lugovoi, Physical-Technical Institute, Fizika-Solntse Research and Production Association, Uzbek Academy of Sciences, ul. Mavlyanova 2b, Tashkent, 700084 Republic of Uzbekistan V. S. Navotny, Physical-Technical Institute, Fizika-Solntse Research and Production Association, Uzbek Academy of Sciences, ul. Mavlyanova 2b, Tashkent, 700084 Republic of Uzbekistan N. S. Saidkhanov, Physical-Technical Institute, Fizika-Solntse Research and Production Association, Uzbek Academy of Sciences, ul. Mavlyanova 2b, Tashkent, 700084 Republic of Uzbekistan V. M. Chudakov, Physical-Technical Institute, Fizika-Solntse Research and Production Association, Uzbek Academy of Sciences, ul. Mavlyanova 2b, Tashkent, 700084 Republic of Uzbekistan Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    Results obtained by measuring fluctuations of the number of neutral pions in the SERP-E-190 Experiment (Thermalization Project) upon irradiating a liquid-hydrogen target of the SVD-2 setup with a beam of 50-GeV protons are presented. A simulation of the detection of photons from the decay of neutral pions with the aid of an electromagnetic calorimeter revealed a linear relation between the number of detected photons and the mean number of neutral pions in an event. After the introduction of corrections for the loss of charged tracks because of a limited acceptance of the setup, trigger operation, and the efficiency of the data-treatment system, distributions of the number of neutral pions, N 0 , were obtained for each value of the total number of particles in an event, N tot = N ch + N 0 . The fluctuation parameter ω = D /〈 N 0 〉 was measured. In the region N tot 〉 22, fluctuations of the number of neutral pions increase, which, within statistical models (GCE, CE, MCE), indicates that the system involving a large number of pions approaches the pion-condensate state. This effect was observed for the first time. Content Type Journal Article Category Elementary Particles and Fields Pages 989-998 DOI 10.1134/S1063778812080091 Authors V. N. Ryadovikov, Institute for High Energy Physics, pl. Nauki 1, Protvino, Moscow oblast, 142281 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    The transverse-momentum dependence of inclusive differential cross sections measured in various collider experiments for processes involving the production of long-lived charged hadrons was approximated by the sum of an exponential and a power-law function. The dependence of the parameters appearing in these functions on the colliding-particle energy and type was studied, and relationships between these parameters were established. A number of new regularities in the behavior of charged-particle spectra were discovered. Content Type Journal Article Category Elementary Particles and Fields Pages 999-1005 DOI 10.1134/S1063778812040047 Authors A. A. Bylinkin, Institute for Theoretical and Experimental Physics, Bol’shaya Cheremushkinskaya ul. 25, Moscow, 117289 Russia A. A. Rostovtsev, Institute for Theoretical and Experimental Physics, Bol’shaya Cheremushkinskaya ul. 25, Moscow, 117289 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    Differential and total cross sections for eta-meson production in the reaction π − p → ηn were measured within the experimental program eta-meson physics implemented in the pion channel of the synchrocyclotron of the Petersburg Nuclear Physics Institute (PNPI, Gatchina). These measurements were performed at incident-pion momenta (700, 710, 720, and 730 MeV/ c ) in the vicinity of the threshold for the process under study by using the neutral-meson spectrometer designed and created at the Meson Physics Laboratory of PNPI. It is shown that, in the immediate vicinity of the threshold (685 MeV/ c ), the process of eta-meson production proceeds predominantly via S 11 (1535)-resonance formation followed by the decay S 11 (1535) → ηn (the respective branching fraction is Br ≈ 60%), but that, as the momentum of incident pions increases, the role of the D wave becomes ever more important. A detailed analysis of this effect indicates that it is due to the increasing contribution of the D 13 (1520) resonance. Although the branching fraction of the decay of this resonance through the ηn channel is assumed to be very small (BR ≈ 0.24%), the effect is enhanced owing to the interference between the D wave and the dominant resonance S 11 (1535). Content Type Journal Article Category Nuclei Pages 923-932 DOI 10.1134/S1063778812080042 Authors D. E. Bayadilov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia Yu. A. Beloglazov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia A. B. Gridnev, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia N. G. Kozlenko, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia S. P. Kruglov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia A. A. Kulbardis, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia I. V. Lopatin, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia D. V. Novinskiy, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia A. K. Radkov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia V. V. Sumachev, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia E. A. Filimonov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia A. V. Shvedchikov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    We study the heavy-quark contributions to the proton structure function F 2 ( x,Q 2 ) at next-to-leading order using compact formulas at small values of Bjorken’s x variable. The formulas provide a good agreement with the modern HERA data for F 2 c ( x,Q 2 ). Content Type Journal Article Category Elementary Particles and Fields Pages 1234-1239 DOI 10.1134/S1063778812100092 Authors A. Yu. Illarionov, Dipartimento di Fisica, Universitá di Trento, Trento, Italy A. V. Kotikov, Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    The electroweak model, which lepton sector correspond to the contracted gauge group SU (2; j ) × U (1), j → 0, whereas boson and quark sectors are standard one, is suggested. The field space of the model is fibered under contraction in such a way that neutrino fields are in the fiber and all other fields are in the base. Properties of the fibered field space are understood in context of semi-Riemannian geometry. This model describes in a natural manner why neutrinos so rarely interact with matter, as well as why neutrino cross section increase with the energy. Dimensionfull parameter of the model is interpreted as neutrino energy. Dimensionless contraction parameter j at low energy is connected with the Fermi constant of weak interactions and is approximated as j 2 ≈ 10 −5 . Content Type Journal Article Category Elementary Particles and Fields Pages 1203-1209 DOI 10.1134/S1063778812100067 Authors N. A. Gromov, Department of Mathematics, Komi Science Center UrD RAS, Syktyvkar, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    A dielectric medium consisting of rigidly polarized molecules has been treated as a quantum 3 D disordered spin system. It is shown that using Birkhoff’s ergodic hypothesis the initial 3 D disordered spin problem on scales of space-time periods of external field is reduced to two conditionally separable 1 D problems. The first problem describes a 1 D disordered N -particle quantum system with relaxation in random environment while the second one describes statistical properties of ensemble of disordered 1 D steric spin chains of certain length. Basing on constructions which are developed in both problems, the coefficient of polarizability related to collective orientational effects under the influence of external field was calculated. On the basis of these investigations the equation of Clausius-Mossotti (CM) has been generalized as well as the equation for permittivity. It is shown that under the influence of weak standing electromagnetic fields in the equation of CM arising of catastrophe is possible, that can substantially change behavior of permittivity in the X-ray region on the macroscopic scale of space. Content Type Journal Article Category Elementary Particles and Fields Pages 1182-1194 DOI 10.1134/S1063778812100043 Authors A. S. Gevorkyan, Institute for Informatics and Automation Problems, NAS of Armenia, Yerevan, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    It is a brief review of a new class of N = 2supersymmetric Landau models which generalize the superplane Landau model by extending it to an arbitrary magnetic field on any two-dimensional manifold M 2 . Using an off-shell N = 2 superfield formalism, it is shown that these models are characterized by two independent potentials given on M 2 . The relevant Hamiltonians are factorizable and in the special case, when both the Gauss curvature and the magnetic field are constant over M 2 , admit infinite series of factorization chains, which implies the integrability of the associated systems. For the particular model with the ℂℙ 1 bosonic manifold, the spectrum and eigenvectors are explicitly given. Content Type Journal Article Category Elementary Particles and Fields Pages 1227-1233 DOI 10.1134/S1063778812100109 Authors E. A. Ivanov, Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    We present off-shell generating functions for all cubic interactions of totally symmetric massless Higher-Spin gauge fields and discuss their properties. Content Type Journal Article Category Elementary Particles and Fields Pages 1264-1267 DOI 10.1134/S1063778812100146 Authors K. Mkrtchyan, Yerevan Physics Institute, Yerevan, Armenia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    A novel method of the decompositon of a quantum system’s Hamiltonian is presented. In this approach the criterion of the decomposition is determined by the symmetries possessed by the sub-Hamiltonians. This procedure is rather generic and independent of the actual global symmetry, or the lack of it, of the full Hamilton operator. A detailed investigation of the time evolution of the various sub-Hamiltonians, therefore the change in time of the symmetry of the physical object, is presented for the case of a vibrator-plus-rotor model. Analytical results are illustrated by direct numerical calculations. Content Type Journal Article Category Elementary Particles and Fields Pages 1195-1202 DOI 10.1134/S1063778812100055 Authors A. Góźdź, Department of Mathematical Physics, Institute of Physics, University of Maria Curie-Skłodowska, Lublin, Poland M. Góźdź, Department of Complex Systems and Neurodynamics, Institute of Informatics, University of Maria Curie-Skłodowska, Lublin, Poland Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    The metric operator, which is the basic ingredient for studying a quantum system described by a pseudo-Hermitian Hamiltonian, provides the necessary means for obtaining an equivalent description of the system using a Hermitian Hamiltonian. In the framework of supersymmetric quantum mechanics, we propose a method of constructing the metric operator and to obtain the Hermitian Hamiltonian equivalent to the given pseudo-Hermitian. Content Type Journal Article Category Elementary Particles and Fields Pages 1294-1298 DOI 10.1134/S1063778812100183 Authors V. V. Shamshutdinova, Tomsk State University, Tomsk, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    We start from a noncompact Lie algebra isomorphic to the Dirac algebra and relate this Lie algebra in a brief review to low-energy hadron physics described by the compact group SU (4). This step permits an overall physical identification of the operator actions. Then we discuss the geometrical origin of this noncompact Lie algebra and “reduce” the geometry in order to introduce in each of these steps coordinate definitions which can be related to an algebraic representation in terms of the spontaneous symmetry breakdown along the Lie algebra chain su* (4) → usp (4) → su (2) × u (1). Standard techniques of Lie algebra decomposition(s) as well as the (physical) operator identification give rise to interesting physical aspects and lead to a rank-1 Riemannian space which provides an analytic representation and leads to a 5-dimensional hyperbolic space H 5 with SO (5, 1) isometries. The action of the (compact) symplectic group decomposes this (globally) hyperbolic space into H 2 ⊕ H 3 with SO (2, 1) and SO (3, 1) isometries, respectively, which we relate to electromagnetic (dynamically broken SU (2) isospin) and Lorentz transformations. Last not least, we attribute this symmetry pattern to the algebraic representation of a projective geometry over the division algebra H and subsequent coordinate restrictions. Content Type Journal Article Category Elementary Particles and Fields Pages 1173-1181 DOI 10.1134/S1063778812100031 Authors R. Dahm, Beratung für Informationssysteme und Systemintegration, Mainz, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 10

Description:    Microscopic folding calculations based upon the effective M3Y nucleon-nucleon interaction and the nuclearmatter densities of the interacting nuclei have been carried out to explain recently measured experimental data of the 6 He+ 120 Sn elastic scattering cross section at four different laboratory energies near the Coulomb barrier. The extracted reaction cross sections are also considered. Content Type Journal Article Category Nuclei Pages 969-972 DOI 10.1134/S1063778812080078 Authors Awad A. Ibraheem, Physics Department, Al-Azhar University, Assiut Branch, Assiut, Egypt M. A. Hassanain, Physics Department, King Khalid University, Abha, Saudia Arabia S. R. Mokhtar, Physics Department, Assiut University, Assiut, Egypt M. A. Zaki, Physics Department, South-Valley University, Aswan, Egypt Zakaria M. M. Mahmoud, Sciences Department, New-Valley Faculty of Education, Assiut University, El-Kharga, Egypt M. El-Azab Farid, Physics Department, Assiut University, Assiut, Egypt Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    The photoproduction of pion-nucleon pairs on nuclei was analyzed. The contributions of both nucleonic and isobar configurations in the ground state of nuclei were taken into account. The cross section for the photoproduction of pion-proton pairs in the reactions 16 O( γ, π + p ) 15 C and 12 C( γ, π + p ) 11 Be were calculated. Content Type Journal Article Category Elementary Particles and Fields Pages 1019-1033 DOI 10.1134/S1063778812080066 Authors I. V. Glavanakov, Institute of Physics and Technology, Tomsk Polytechnic University, pr. Lenina 30, Tomsk, 634050 Russia A. N. Tabachenko, Institute of Physics and Technology, Tomsk Polytechnic University, pr. Lenina 30, Tomsk, 634050 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    Superdeformed nuclei at high-spin states in several mass regions are investigated within a microscopic approach using cranked Nilsson-Strutinsky formalism to explore the equilibrium deformations in the ground state and their evolution with spin. Shape transition from normal deformed to superdeformed states with increasing spin is studied and a clear picture of shape coexistence is provided. Detailed information on spin, rotational energy, dynamical moment of inertia, and rotational frequency of superdeformed rotational bands is presented and the general features of superdeformed bands in certain mass regions are outlined. Rotational energy and dynamical moment of inertia are compared with available experimental data and the impact of temperature and pairing on superdeformed configuration are discussed. Content Type Journal Article Category Nuclei Pages 949-957 DOI 10.1134/S106377881208008X Authors G. Kanthimathi, Department of Physics, Manonmaniam Sundaranar University, Tirunelveli, India N. Boomadevi, Department of Physics, Manonmaniam Sundaranar University, Tirunelveli, India T. R. Rajasekaran, Department of Physics, Manonmaniam Sundaranar University, Tirunelveli, India Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    The elastic scattering of the halo nucleus 6 He from heavy targets such as 197 Au and 208 Pb has been investigated in order to explain the Coulomb rainbow peak due to the Fresnel-type diffraction observed in the experimental data. In order to examine the role of nuclear potential to describe 6 He + 197 Au and 6 He + 208 Pb systems, we have used the no-core shell model, few-body and Gaussian-shaped density distributions at various energies. The microscopic real parts of the complex nuclear potential have been obtained by using the double-folding model for each of the density distribution and the phenomenological imaginary potentials have been taken as the standard Woods-Saxon shape. We have observed that fewbody and Gaussian-shaped density distributions have given standard Fresnel-type diffraction results, a classical scattering pattern with Coulomb rainbow peak whereas the nuclear potential obtained by using the no-core shell-model density distribution has provided the reduction at Fresnel peak and has given more consistent results with the experimental data. Content Type Journal Article Category Nuclei Pages 963-968 DOI 10.1134/S1063778812080030 Authors M. Aygun, Department of Physics, Bitlis Eren University, Bitlis, Turkey I. Boztosun, Department of Physics, Akdeniz University, Antalya, Turkey Y. Sahin, Department of Physics, Ataturk University, Erzurum, Turkey Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    The temperature dependence of the enhancement factor for the dd reaction proceeding in TiD 2 and ZrD 2 is investigated. The experiments were carried out at the Hall pulsed ion accelerator (INP, Polytechnic University, Tomsk, Russia) in the deuteron energy interval 7.0–12.0 keV and at temperatures ranging from 20 to 200°C. The values obtained for the electron screening potentials indicate that the dd reaction enhancement factor does not depend on the target temperature in the range 20–200°C. This result contradicts the conclusions drawn by the LUNA Collaboration from their work. Content Type Journal Article Category Nuclei Pages 913-922 DOI 10.1134/S1063778812080054 Authors V. M. Bystritsky, Joint Institute for Nuclear Research, Dubna, Russia Vit. M. Bystritskii, Department of Physics and Astronomy, University of California, Irvine, USA G. N. Dudkin, National Scientific Research Tomsk Polytechnical University, Tomsk, Russia M. Filipowicz, Faculty of Energy and Fuels, AGH, University of Science and Technology, Cracow, Poland S. Gazi, Institute of Electrical Engineering SAS, Bratislava, Slovakia J. Huran, Institute of Electrical Engineering SAS, Bratislava, Slovakia A. P. Kobzev, Joint Institute for Nuclear Research, Dubna, Russia G. A. Mesyats, Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia B. A. Nechaev, National Scientific Research Tomsk Polytechnical University, Tomsk, Russia V. N. Padalko, National Scientific Research Tomsk Polytechnical University, Tomsk, Russia S. S. Parzhitskii, Joint Institute for Nuclear Research, Dubna, Russia F. M. Pen’kov, Institute of Nuclear Physics NNC, Almaty, Kazakhstan A. V. Philippov, Joint Institute for Nuclear Research, Dubna, Russia V. L. Kaminskii, National Scientific Research Tomsk Polytechnical University, Tomsk, Russia Yu. Zh. Tuleushev, Institute of Nuclear Physics NNC, Almaty, Kazakhstan J. Wozniak, Faculty of Physics and Applied Computer Sciences, AGH, University of Science and Technology, Cracow, Poland Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    A stochastic approach based on four-dimensional Langevin fission dynamics is applied to calculating mass-energy distributions of fragments originating from the fission of excited compound nuclei. In the model under investigation, the coordinate K representing the projection of the total angular momentum onto the symmetry axis of the nucleus is taken into account in addition to three collective shape coordinates introduced on the basis of the { c, h, α } parametrization. The evolution of the orientation degree of freedom ( K mode) is described by means of the Langevin equation in the overdamped regime. The tensor of friction is calculated under the assumption of the reducedmechanismof one-body dissipation in the wall-plus-window model. The calculations are performed for two values of the coefficient that takes into account the reduction of the contribution from the wall formula: k s = 0.25 and k s = 1.0. Calculations with a modified wall-plus-window formula are also performed, and the quantity measuring the degree to which the single-particle motion of nucleons within the nuclear system being considered is chaotic is used for k s in this calculation. Fusion-fission reactions leading to the production of compound nuclei are considered for values of the parameter Z 2 / A in the range between 21 and 44. So wide a range is chosen in order to perform a comparative analysis not only for heavy but also for light compound nuclei in the vicinity of the Businaro-Gallone point. For all of the reactions considered in the present study, the calculations performed within four-dimensional Langevin dynamics faithfully reproduce mass-energy and mass distributions obtained experimentally. The inclusion of the K mode in the Langevin equation leads to an increase in the variances of mass and energy distributions in relation to what one obtains from three-dimensional Langevin calculations. The results of the calculations where one associates k s with the measure of chaoticity in the single-particle motion of nucleons within the nuclear system under study are in good agreement for variances of mass distributions. The results of calculations for the correlations between the prescission neutron multiplicity and the fission-fragment mass, 〈 n pre ( M )〉, and between, this multiplicity and the kinetic energy of fission fragments, 〈 n pre ( E k )〉, are also presented. Content Type Journal Article Category Nuclei Pages 933-948 DOI 10.1134/S1063778812080029 Authors Yu. A. Anischenko, Omsk State University, pr. Mira 55a, Omsk, 644077 Russia G. D. Adeev, Omsk State University, pr. Mira 55a, Omsk, 644077 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    Cold reaction valleys in the radioactive decay of superheavy nuclei 286 112, 292 114, and 296 116 are studied taking Coulomb and Proximity Potential as the interacting barrier. It is found that in addition to alpha particle, 8 Be, 14 C, 28 Mg, 34 Si, 50 Ca, etc. are optimal cases of cluster radioactivity since they lie in the cold valleys. Two other regions of deep minima centered on 208 Pb and 132 Sn are also found. Within our Coulomb and Proximity Potential Model half-life times and other characteristics such as barrier penetrability, decay constant for clusters ranging from alpha particle to 68 Ni are calculated. The computed alpha half-lives match with the values calculated using Viola-Seaborg-Sobiczewski systematics. The clusters 8 Be and 14 C are found to be most probable for emission with T 1/2 〈 10 30 s. The alpha-decay chains of the three superheavy nuclei are also studied. The computed alpha-decay half-lives are compared with the values predicted by Generalized Liquid Drop Model and they are found to match reasonably well. Content Type Journal Article Category Nuclei Pages 973-983 DOI 10.1134/S1063778812080108 Authors K. P. Santhosh, School of Pure and Applied Physics, Kannur University, Payyanur Campus, India S. Sabina, School of Pure and Applied Physics, Kannur University, Payyanur Campus, India Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    Cross sections for Jψ -meson pair production in proton-proton interaction at the c.m. collision energy of Ö s = 7 TeV were theoretically predicted under conditions of various kinematical cuts. The possible contribution to this process from the decays of 4 c tetraquarks, new hypothetic particles consisting of two valence c quarks and two valence - c   antiquarks, was studied. It is shown that at least one such state (tensor 4 c tetraquark) can in principle be observed experimentally under conditions of the LNCb experiment. Content Type Journal Article Category Elementary Particles and Fields Pages 1006-1013 DOI 10.1134/S1063778812040035 Authors A. V. Berezhnoy, Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991 Russia A. K. Likhoded, Institute for High Energy Physics, Protvino, Moscow oblast, 142284 Russia A. V. Luchinsky, Institute for High Energy Physics, Protvino, Moscow oblast, 142284 Russia A. A. Novoselov, Institute for High Energy Physics, Protvino, Moscow oblast, 142284 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    The method developed by Pyatov and Salamov has been used to study the Gamow-Teller transition strength in the iron mass region nuclei. Calculations have been performed within the framework of the proton-neutron quasiparticle random-phase approximation with separable Gamow-Teller residual interactions. The obtained results have been compared with other theoretical results and the corresponding experimental data. Content Type Journal Article Category Nuclei Pages 958-962 DOI 10.1134/S106377881208011X Authors S. Ünlü, Department of Physics, Mehmet Akif Ersoy University, Burdur, Turkey Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    In searches along a track in the chamber irradiated at the Laboratory of High Energies at the Joint Institute for Nuclear Research (JINR, Dubna) with oxygen ions accelerated to a momentum of 4.5 GeV/ c per nucleon, 215 events containing two or more doubly charged fragments of the primary nucleus were found. Emission angles in the track-emulsion plane were measured in these events. Their distribution is consistent with that which alpha particles are expected to have in an oxygen nucleus prior to its interaction with a track-emulsion nucleus. Events of the 16 O → 2 8 Be → 4 α type were discovered for the first time. They are treated as events of the coherent electromagnetic dissociation of an oxygen nucleus. Among all events, about 14% of the 8 Be → 2 α decays proceed through the ground state of spin-parity 0 + ; an approximately the same fraction of such decays proceed through the first excited state of spin-parity 2 + . Content Type Journal Article Category Elementary Particles and Fields Pages 984-988 DOI 10.1134/S1063778812040102 Authors F. G. Lepekhin, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia L. N. Tkach, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188300 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 8

Description:    A new method to measure polarization of cold/thermal neutrons using P -even asymmetry in nuclear reactions induced by polarized neutrons is proposed. A scheme profiting from a large correlation of the neutron spin and the circular γ -quantum polarization in the reaction ( n, γ ) of polarized neutrons with nuclei is analyzed. This method could be used, for instance, to measure the neutron-beam polarization in experiments with frequently varying configuration. We show that high accuracy and reliability of measurements could be expected. Content Type Journal Article Category Nuclei Pages 781-784 DOI 10.1134/S1063778812030076 Authors Yu. M. Gledenov, Joint Institute for Nuclear Research, Dubna, Russia V. V. Nesvizhevsky, Institut Max von Laue—Paul Langevin, Grenoble, France P. V. Sedyshev, Joint Institute for Nuclear Research, Dubna, Russia E. V. Shul’gina, Petersburg Institute of Nuclear Physics, RAS, Gatchina, Russia V. A. Vesna, Petersburg Institute of Nuclear Physics, RAS, Gatchina, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    Renormdynamic equations of motion and their solutions are given. New equation for negative binomial distribution and Riemann zeta function invented. Content Type Journal Article Category Elementary Particles and Fields Pages 899-902 DOI 10.1134/S1063778812070071 Authors N. V. Makhaldiani, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    Density fluctuations of intranuclear matter suffering collisions with projectile particles are capable to turn into multiquark clusters with chiral symmetry restored. Theoretical analysis of these processes requires an additional taking account of finite-size effects in the region of the chiral phase transition. From the experimental point of view, this method of observation of the chiral phase transition has its inherent advantages due to a relatively moderate number of secondary particles to be registered. Content Type Journal Article Category Elementary Particles and Fields Pages 888-889 DOI 10.1134/S1063778812070046 Authors B. F. Kostenko, Joint Institute for Nuclear Research, Dubna, Russia J. Pribiš, Technical University, Košice, Slovakia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    In order to investigate the possible emergence of guark-gluon plasma, it is necessary to understand the properties of multiparticle production mechanisms in a more simple case than in relativistic collisions of heavy ions. The purpose of this article is to discuss some problems of the role of zone formation effectwhich are under active investigation nowadays. The formation length of hadron from particle-nucleus collision is derived and compared with those from relativistic ion collisions. Content Type Journal Article Category Elementary Particles and Fields Pages 879-881 DOI 10.1134/S1063778812060129 Authors S. M. Eliseev, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We briefly discuss the role played by the finiteness of the system created in high-energy heavyion collisions (HIC’s) in the experimental search of the QCD critical endpoint and, in particular, the applicability of the predicting power of finite-size scaling plots in data analysis of current HIC’s. Content Type Journal Article Category Elementary Particles and Fields Pages 906-907 DOI 10.1134/S1063778812070095 Authors L. F. Palhares, Institut de Physique Théorique, CEA Saclay, Gif-sur-Yvette cedex, France E. S. Fraga, Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    In this work a formula for charmonium suppression obtained by Matsui in 1989 is analytically generalized for the case of complex c - c   potential described by a 3-dimensional and isotropic time-dependent harmonic oscillator (THO). It is suggested that under certain scheme the formula can be applied to describe J/ψ suppression in heavy-ion collisions at CERN-SPS, RHIC, and LHC with the advantage of analytical tractability. Content Type Journal Article Category Elementary Particles and Fields Pages 896-898 DOI 10.1134/S1063778812070101 Authors C. Peña, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland D. Blaschke, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We review some basics of AdS/QCD following a non-standard path and list a few results from AdS/QCD or holographic QCD. The non-standard path here is to use the analogy of the way one obtains an effective model of QCD like linear sigma model and the procedure to construct an AdS/QCD model based on the AdS/CFT dictionary. Content Type Journal Article Category Elementary Particles and Fields Pages 870-872 DOI 10.1134/S1063778812060208 Authors Y. Kim, Asia Pacific Center for Theoretical Physics and Department of Physics, Pohang University of Science and Technology, Pohang, Gyeongbuk, Korea Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    A correlation function, the chemical potential, coefficients in a special Bogolyubov transformation, and single-quasiparticle energies were calculatedwith allowance for the effect of the monopole-pairing potential on the energies of single-particle nucleon states in the mean nuclear field. Content Type Journal Article Category Nuclei Pages 805-810 DOI 10.1134/S1063778812040096 Authors V. A. Kuz’min, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980 Russia T. V. Tetereva, Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    The time evolution of vector meson spectral functions is studied within a BUU-type transport model. Applications focus on ρ and ω mesons being important pieces for the interpretation of the dielectron invariant mass spectrum. Since the evolution of the spectral functions is driven by the local density, the inmedium modifications turn out to compete, in this approach, with the known vacuum contributions. Content Type Journal Article Category Elementary Particles and Fields Pages 718-720 DOI 10.1134/S1063778812060336 Authors Gy. Wolf, KFKI RMKI, Budapest, Hungary B. Kämpfer, Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik, Dresden, Germany M. Zétényi, KFKI RMKI, Budapest, Hungary Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Here I discuss a possibility to connect quantum numbers of elementary particles with their structure on the base of four connected components of Lorentz group. The complete and closed (with respect to homogenous Lorentz group) series of equations for description of lepton sector forms the pattern and ground for the present project. Content Type Journal Article Category Elementary Particles and Fields Pages 885-887 DOI 10.1134/S1063778812070034 Authors O. S. Kosmachev, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    Double extensive air showers and aligned events at energies in the region E ≳ 10 16 eV were discovered more than a quarter of a century ago. However, there is still no satisfactory explanation of their nature. In the present study, it is assumed that these two types of events have common nature, stemming from the break of a string that arises in the interaction of ultrahigh-energy particles. Content Type Journal Article Category Elementary Particles and Fields Pages 845-849 DOI 10.1134/S1063778812030192 Authors V. I. Yakovlev, Lebedev Institute of Physics, Russian Academy of Sciences, Leninskii pr. 53, Lebedev, 117924 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    The non-perturbative effects for the Quark-Gluon Plasma (QGP) equation of state (EoS) are considered. The modifications of the bag model EoS are constructed to satisfy the main qualitative features observed for the QGP EoS in the lattice QCD calculations. A quantitative comparison with the lattice results is done for the SU (3) gluon plasma and for the QGP with dynamical quarks. Our analysis advocates a negative value of the bag constant B . Content Type Journal Article Category Elementary Particles and Fields Pages 873-878 DOI 10.1134/S1063778812060038 Authors V. V. Begun, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine M. I. Gorenstein, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine O. A. Mogilevsky, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    Multiparticle azimuthal correlations of π − mesons have been studied in d C, HeC, CC, CNe, MgMg, ( d , He)Ta, CCu, CTa, and OPb collisions at momentum of 4.2, 4.5 GeV/ c per nucleon within the standard transverse momentum analysis method of P. Danielewicz and G. Odyniec. The data were obtained by SKM-200-GIBS and Propane Bubble Chamber Collaborations of JINR. The axis has been selected in the phase space and with respect to this axis π − meson correlations were observed. The values of the coefficient of the correlations linearly depend on the mass numbers of projectile ( A P ) and target ( A T ) nuclei. The Quark-Gluon String Model satisfactorily describes the experimental results. Content Type Journal Article Category Nuclei Pages 811-817 DOI 10.1134/S1063778812030064 Authors L. V. Chkhaidze, High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia T. D. Djobava, High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia L. L. Kharkhelauri, High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia E. N. Kladnitskaya, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We discuss a three-flavor Nambu-Jona-Lasinio model for the quark matter equation of state with scalar diquark interaction, isoscalar vector interaction and Kobayashi-Maskawa-’t Hooft interaction. We adopt a phenomenological scheme to include possible effects of a change in the gluon pressure at finite baryon density by including a parametric dependence of the Polyakov-loop potential on the chemical potential. We discuss the results for the mass-radius relationships for hybrid neutron stars constructed on the basis of our model EoS in the context of the constraint from the recently measured mass of (1.97 ± 0.04) M ⊙ for the pulsar PSR J1614-2230. Content Type Journal Article Category Elementary Particles and Fields Pages 893-895 DOI 10.1134/S106377881207006X Authors R. Łastowiecki, Institute for Theoretical Physics, University of Wrocław, Wrocław, Poland D. Blaschke, Institute for Theoretical Physics, University of Wrocław, Wrocław, Poland J. Berdermann, DESY, Zeuthen, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    Using the model with decaying magnetic fields it is possible to describe with one smooth (log-Gaussian) initial magnetic field distribution three types of isolated neutron stars: radiopulsar, magnetars, and cooling close-by compact objects. The same model is used here to make predictions for old accreting isolated neutron stars. It is shown that using the updated field distribution we predict a significant fraction of isolated neutron stars at the stage of accretion despite long subsonic propeller stage. Content Type Journal Article Category Elementary Particles and Fields Pages 908-909 DOI 10.1134/S1063778812070022 Authors P. A. Boldin, Moscow Engineering Physics Institute (State University), Moscow, Russia S. B. Popov, Sternberg Astronomical Institute, Moscow State University, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We study the Gaussian fluctuations of the two-flavor, meson-diquark bosonized NJL model for two and three colors at the color superconducting phase transition. The analysis is based on analytical properties of the polarization matrix. Pionic fluctuations are shown to be stabilised in the 2SC phase compared to the two-color result where they are right on threshold. Content Type Journal Article Category Elementary Particles and Fields Pages 910-912 DOI 10.1134/S1063778812070113 Authors D. S. Zablocki, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland D. Blaschke, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland M. Buballa, Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    A good description of the quadrupole moments is obtained by investigating 94,96,98,100,102,104,106,108 Mo isotopes in terms of the interacting boson model. After the positiveparity states and electromagnetic-transition rates B ( E 2) of even-mass Mo nuclei were calculated it was seen that there is a good agreement between the obtained results and some previous experimental data. At the end of the quadrupole moment calculations it was proved that the results agree well with the previous experimental data. Content Type Journal Article Category Nuclei Pages 798-804 DOI 10.1134/S1063778812030180 Authors N. Turkan, Bozok University Faculty of Arts and Science, Yozgat, Turkey I. Ibis, Bozok University Institute of Science, Yozgat, Turkey I. Maras, Celal Bayar University Faculty of Arts and Science, Manisa, Turkey Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    It is shown the analysis [1] for QED in (2 + 1) dimensions with N four-component fermions in the leading and next-to-leading orders of the 1/ N expansion. As it was demonstrated in [1], the range of the admissible values N , where the dynamical fermion mass exists, decreases strongly with the increasing of the gauge charge. So, in Landau gauge the dynamical chiral symmetry breaking appears for N 〈 3.78, that is very close to the results of the leading order and in Feynman gauge dynamical mass is completely absent. Content Type Journal Article Category Elementary Particles and Fields Pages 890-892 DOI 10.1134/S1063778812070058 Authors A. V. Kotikov, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    Existing experimental data on elastic and inelastic deuteron scattering on 6 Li nuclei in the energy range from 8 to 50 MeV were analyzed within the approach of coupled reaction channels. The coupling of elastic scattering and inelastic scattering accompanied by the transition to the 3 + state at E x = 2.186 MeV and the mechanism involving the exchange of an alpha-particle cluster were taken into account in respective calculations. The phenomenological potentials obtained from the present analysis describe well experimental angular distributions at all energies and in full angular ranges. The depths of the real and imaginary parts of the potentials in question depend smoothly on energy at fixed values of the remaining parameters. The energy dependence of relevant volume integrals agrees well with similar data for the p + 6 Li, α + 6 Li, and 12 C + 12 C systems and with the predictions of a microscopic theory. Content Type Journal Article Category Nuclei Pages 785-797 DOI 10.1134/S1063778812040138 Authors S. B. Sakuta, Russian Research Centre Kurchatov Institute, pl. Akademika Kurchatova 1, Moscow, 123182 Russia N. Burtebaev, Institute of Nuclear Physics, National Nuclear Center of the Republic Kazakhstan, ul. Ibragimova 1, 480082 Almaty, Republic of Kazakhstan S. V. Artemov, Institute of Nuclear Physics, National Nuclear Center of the Republic Uzbekistan, pos. Ulughbek, Tashkent, 702132 Republic of Uzbekistan R. Yarmukhamedov, Institute of Nuclear Physics, National Nuclear Center of the Republic Uzbekistan, pos. Ulughbek, Tashkent, 702132 Republic of Uzbekistan Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    A model of a deuteron-nucleus ( dA ) optical potential is developed. The real and imaginary parts of this potential were determined from the calculation of the mass operator in the respective Green’s function by perturbation theory on the basis of effective nuclear-density-dependent nucleon-nucleon ( NN ) Skyrme forces and with allowance for the rearrangement potential. Radial and energy dependences of various components of the dA potential were studied in the calculations with various versions of Skyrme forces. The presentmodel was applied to analyzing differential cross sections for elastic deuteron scattering on nuclei over a broad range of mass numbers at various energies and total cross sections for dA reactions. A reasonable description of respective experimental data was obtained. Content Type Journal Article Category Nuclei Pages 832-844 DOI 10.1134/S1063778812040084 Authors V. I. Kuprikov, Kharkiv Institute of Physics and Technology, Akademicheskaya ul. 1, 61108 Kharkiv, Ukraine V. V. Pilipenko, Kharkiv Institute of Physics and Technology, Akademicheskaya ul. 1, 61108 Kharkiv, Ukraine A. P. Soznik, Kharkiv Institute of Physics and Technology, Akademicheskaya ul. 1, 61108 Kharkiv, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We study the kinetic and chemical equilibration in “infinite” parton matter within the Parton-Hadron-String Dynamics transport approach. The “infinite” matter is simulated within a cubic box with periodic boundary conditions initialized at different energy densities. Particle abundances, kinetic energy distributions, and the detailed balance of the off-shell quarks and gluons in the strongly-interacting quarkgluon plasma are addressed and discussed. Content Type Journal Article Category Elementary Particles and Fields Pages 903-905 DOI 10.1134/S1063778812070083 Authors V. Ozvenchuk, Frankfurt Institute for Advanced Studies, Frankfurt, Germany O. Linnyk, Institut für Theoretische Physik, Goethe-Universität, Frankfurt, Germany E. Bratkovskaya, Frankfurt Institute for Advanced Studies, Frankfurt, Germany M. Gorenstein, Bogolyubov Institute for Theoretical Physics, NAS Ukraine, Kiev, Ukraine W. Cassing, Institut für Theoretische Physik, Justus-Liebig Universität, Gießen, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We apply the microscopic three-cluster model, developed by the authors recently, to study the effects of cluster polarization on the capture reactions 3 He( α, γ ) 7 Be, 3 H( α, γ ) 7 Li, 6 Li( p, γ ) 7 Be, and 6 Li( n, γ ) 7 Li. These reactions are of great importance for astrophysical applications. Thus, the main attention is paid to the cross sections (or the astrophysical S factor) of the reactions in the low-energy region. Correlations between the astrophysical S factor of the reactions at zero energy and different quantities associated with the ground state of a compound nucleus are studied in detail. Content Type Journal Article Category Nuclei Pages 818-831 DOI 10.1134/S106377881204014X Authors V. S. Vasilevsky, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine A. V. Nesterov, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine T. P. Kovalenko, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    The equation of state is calculated for temperatures less than 30 MeV and densities less than four times the saturation density of nuclear matter using a combined analysis of Auxiliarly Fields Diffusion Monte Carlo and Fermi Hypernetted Change methods. Content Type Journal Article Category Elementary Particles and Fields Pages 866-869 DOI 10.1134/S1063778812060166 Authors A. Yu. Illarionov, Dipartimento di Fisica dell’Universitá di Trento, Trento, Italy S. Fantoni, International School for Advanced Studies, SISSA Trieste, Trieste, Italy F. Pederiva, Dipartimento di Fisica dell’Universitá di Trento, Trento, Italy S. Gandolfi, Theoretical Division, Los Alamos National Laboratory, Los Alamos, USA K. E. Schmidt, Department of Physics, Arizona State University, Tempe, USA Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    We calculate the Debye mass for the screening of the heavy quark potential in a plasma of massless quarks coupled to the temporal gluon background governed by the Polyakov loop potential within the PNJL model in RPA approximation. We give a physical motivation for a recent phenomenological fit of lattice data by applying the calculated Debye mass with its suppression in the confined phase due to the Polyakov loop to a description of the temperature dependence of the singlet free energy for QCD with a heavy quark pair at infinite separation. We compare the result to lattice data. Content Type Journal Article Category Elementary Particles and Fields Pages 882-884 DOI 10.1134/S1063778812060178 Authors J. Jankowski, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland D. Blaschke, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    The one-loop correction to the impact factor for gluon production upon the transition of a one-Reggeon state in the t channel to a two-Reggeon state is found. This impact factor is an element of multiparticle amplitudes in multi-Regge kinematics. The correction in question is necessary for developing the theory of Regge and multi-Regge processes. In particular, it is necessary for proving the multi-Regge form of the amplitude in the next-to-leading-logarithm approximation. This correction also makes it possible to complete the verification of the last of the unproven bootstrap conditions for gluon Reggeization and to prove, in this approximation, the validity of the multi-Regge form of the amplitude. All necessary calculations are presented, and an explicit expression for the impact factor in front of all possible color states in the t channel is given. Content Type Journal Article Category Elementary Particles and Fields Pages 850-865 DOI 10.1134/S1063778812040072 Authors M. G. Kozlov, Budker Institute of Nuclear Physics, Siberian Department, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090 Russia A. V. Reznichenko, Budker Institute of Nuclear Physics, Siberian Department, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090 Russia V. S. Fadin, Budker Institute of Nuclear Physics, Siberian Department, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 7

Description:    In these simulation studies an energy weighting method is applied to the signals of the CMS hadronic calorimeter readout with a longitudinal segmentation for a possible future upgrade. Tabulated weighting factors are used to compensate for the different response of hadronic and electromagnetic energy depositions of simulated pion showers in the hadronic calorimeter. The weighting improves the relative energy resolution: ( s E / E ) 2 = [ ((92.2 ± 0.6)% / Ö E ) 2 + ((6.5 ± 0.1)% ) 2 ] (before weighting), ( s E , weight / E ) 2 = [ ((85.4 ± 0.5)% / Ö E ) 2 + ((4.4 ± 0.1)% ) 2 ] (after weighting), where E in the square root has units of GeV. Content Type Journal Article Category Elementary Particles and Fields Pages 1088-1090 DOI 10.1134/S1063778812090049 Authors K. Borras, DESY, Hamburg, Germany D. Krücker, DESY, Hamburg, Germany I. Melzer-Pellmann, DESY, Hamburg, Germany M. Stein, DESY, Hamburg, Germany P. Schleper, University of Hamburg, Hamburg, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    An analysis of the experimental data on one-pion and two-pion production in the p ( α, α ′) X reaction studied in a semi-exclusive experiment at an energy of E α = 4.2 GeV has been performed. The obtained results demonstrate that the inelastic α -particle scattering on the proton at the energy of the experiment proceeds either through excitation and decay of the Δ resonance in the projectile α particle, or through excitation in the target proton of the Roper resonance, which decays into a nucleon and a pion, or a nucleon and a σ meson—a system of two pions in the isospin I = 0, S -wave state. Content Type Journal Article Category Elementary Particles and Fields Pages 1067-1076 DOI 10.1134/S1063778812090025 Authors G. D. Alkhazov, Petersburg Nuclear Physics Institute, Gatchina, Russia A. N. Prokofiev, Petersburg Nuclear Physics Institute, Gatchina, Russia I. B. Smirnov, Petersburg Nuclear Physics Institute, Gatchina, Russia E. A. Strokovsky, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    Level densities and their energy dependences for nuclei in the mass range of 47 ≤ A ≤ 59 were determined from the results obtained by measuring neutron-evaporation spectra in respective ( p, n ) reactions. The spectra of neutrons originating from the ( p, n ) reactions on 47 Ti, 48 Ti, 49 Ti, 53 Cr, 54 Cr, 57 Fe, and 59 Co nuclei were measured in the proton-energy range of 7–11 MeV. These measurements were performed with the aid of a fast-neutron spectrometer by the time-of-flight method over the base of the EGP-15 pulsed tandem accelerator installed at the Institute for Physics and Power Engineering (Obninsk, Russia). A high resolution of the spectrometer and its stability in the time of flight made it possible to identify reliably discrete low-lying levels along with the continuum part of neutron spectra. Our measured data were analyzed within the statistical equilibrium and preequilibrium models of nuclear reactions. The respective calculations were performed with the aid of the Hauser-Feshbach formalismof statistical theory supplemented with the generalized model of a superfluid nucleus, the back-shifted Fermi gas model, and the Gilbert-Cameron composite formula for nuclear level densities. Nuclear level densities for 47 V, 48 V, 49 V, 53 Mn, 54 Mn, 57 Co, and 59 Ni and their energy dependences were determined. The results are discussed and compared with available experimental data and with recommendations of model-based systematics. Content Type Journal Article Category Nuclei Pages 1035-1040 DOI 10.1134/S1063778812090153 Authors B. V. Zhuravlev, Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia A. A. Lychagin, Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia N. N. Titarenko, Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia V. G. Demenkov, Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia V. I. Trykova, Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    Introductory lectures to the theory of (strongly interacting) quark-gluon plasma given at the Winter School of Physics of ITEP (Moscow, February 2010). We emphasize theoretical issues highlighted by the discovery of the low viscosity of the plasma. The topics include relativistic hydrodynamics, manifestations of chiral anomaly in hydrodynamics, superfluidity, relativistic superfluid hydrodynamics, effective stringy scalars, holographic models of Yang-Mills theories. Content Type Journal Article Category Elementary Particles and Fields Pages 1145-1172 DOI 10.1134/S1063778812090141 Authors V. I. Zakharov, Institute for Theoretical and Experimental Physics, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    Screening in plasma with Bose-Einstein condensate is studied. Finite temperature effects are taken into account. It is shown that, due to condensate effects, the potential has several unusual features. It contains two oscillating terms, one of which is analogous to the fermionic Friedel oscillations in standard QED, and a power law decreasing term. In the T → 0 limit, only one of the oscillating terms survives. On the whole, any charge impurity is screened more efficiently than in ordinary plasma. Content Type Journal Article Category Elementary Particles and Fields Pages 1115-1118 DOI 10.1134/S1063778812090098 Authors A. Lepidi, Università degli Studi di Ferrara, and Istituto Nazionale di Fisica Nucleare Sezione di Ferrara, Ferrara, Italy Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    We demonstrate that, at least at present, there is no convincing way to detect CP violation in heavy-ion collisions. Content Type Journal Article Category Elementary Particles and Fields Pages 1142-1144 DOI 10.1134/S1063778812090086 Authors I. B. Khriplovich, Budker Institute of Nuclear Physics, Novosibirsk, Russia A. S. Rudenko, Budker Institute of Nuclear Physics, Novosibirsk, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    The results for neutrino oscillations in the gravitational field described by the Schwarzschild metric are generalized to the general spherically symmetric gravitational field. Content Type Journal Article Category Elementary Particles And Fields Pages 1111-1114 DOI 10.1134/S1063778812090062 Authors S. I. Godunov, Institute for Theoretical and Experimental Physics, Moscow, Russia G. S. Pastukhov, Institute for Theoretical and Experimental Physics, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    Supernovae and gamma-ray bursts are the most powerful explosions in observed Universe. This educational review tells about supernovae and their applications in cosmology. It is explained how to understand the production of light in the most luminous events with minimum required energy of explosion. These most luminous phenomena can serve as primary cosmological distance indicators. Comparing the observed distance dependence on red shift with theoretical models one can extract information on evolution of the Universe from Big Bang until our epoch. Content Type Journal Article Category Elementary Particles and Fields Pages 1091-1110 DOI 10.1134/S1063778812090037 Authors S. I. Blinnikov, Institute for Theoretical and Experimental Physics, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    We give an account, at nonexpert and quantitative level, of physics behind the CMB temperature anisotropy and polarization and their peculiar features. We discuss, in particular, how cosmological parameters are determined from the CMB measurements and their combinations with other observations. We emphasize that CMB is the major source of information on the primordial density perturbations and, possibly, gravitational waves, and discuss the implication for our understanding of the extremely early Universe. Content Type Journal Article Category Elementary Particles and Fields Pages 1123-1141 DOI 10.1134/S1063778812090116 Authors V. A. Rubakov, Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia A. D. Vlasov, Institute for Theoretical and Experimental Physics, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    Neutrino astrophysics offers a new possibility to observe our Universe: high-energy neutrinos, produced by the most energetic phenomena in our Galaxy and in the Universe, carry complementary (if not exclusive) information about the cosmos: this young discipline extends in fact the conventional astronomy beyond the usual electromagnetic probe. The weak interaction of neutrinos with matter allows them to escape from the core of astrophysical objects and in this sense they represent a complementary messenger with respect to photons. However, their detection on Earth due to the small interaction cross section requires a large target mass. The aim of this article is to review the scientific motivations of the high-energy neutrino astrophysics, the detection principles together with the description of a running apparatus, the experiment ANTARES, the performance of this detector with some results, and the presentation of other neutrino telescope projects. Content Type Journal Article Category Elementary Particles and Fields Pages 1077-1084 DOI 10.1134/S1063778812090050 Authors H. Costantini, Istituto Nazionale di Fisica Nucleare, Genova, Italia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 9

Description:    One of the NA61/SHINE experiment’s goals is to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. This is to be achieved by performing a two-dimensional phase diagram ( T -µ B ) scan—measuring hadron production in collisions of various beam particles and targets at various beam energies. NA61/SHINE also collects data for the T2K experiment, which are just about to be published. Content Type Journal Article Category Elementary Particles and Fields Pages 668-672 DOI 10.1134/S1063778812060105 Authors T. Czopowicz, Faculty of Physics, Warsaw University of Technology, Warsaw, Poland Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    In this contribution we shall discuss some aspects of the role of elementary reference data for the interpretation of the results from nuclear collisions and show in particular that neutron-proton interactions play a significant role. Furthermore we point out that a complete set of elementary data is desirable, because most theoretical concepts for the interpretation of nuclear collisions rely on such data as input for their calculations. Content Type Journal Article Category Elementary Particles and Fields Pages 654-656 DOI 10.1134/S1063778812060294 Authors H. Ströbele, Institut für Kernphysik, Universität Frankfurt, Frankfurt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Effects of viscosity and thermal conductivity on the dynamics of first-order phase transitions are studied. The nuclear gas-liquid and hadron-quark transitions in heavy-ion collisions are considered. We demonstrate that at nonzero thermal conductivity, κ ≠ 0, onset of spinodal instabilities occurs on an isothermal spinodal line, whereas for κ = 0 instabilities take place at lower temperatures, on an adiabatic spinodal. Content Type Journal Article Category Elementary Particles and Fields Pages 770-775 DOI 10.1134/S1063778812050286 Authors D. N. Voskresensky, National Research Nuclear University “MEPhI”, Moscow, Russia V. V. Skokov, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Experimental data on inclusive spectra measured in heavy-ion collisions at RHIC and SPS over a wide range of the energy Ö   s NN   = 9 - 200 GeV are analyzed in the framework of z scaling. A microscopic scenario of constituent interactions in the framework of this approach is discussed. Dependence of the energy loss on the momentum of the produced hadron, energy, and centrality of the collision, is studied. Self-similarity of the constituent interactions in terms of momentum fractions is used to characterize the nuclear medium by “specific heat” and colliding nuclei by fractal dimensions. Preferable kinematical regions for search for signatures of the phase transition of the nuclearmatter produced inHIC are discussed. Discontinuity of “specific heat” is assumed to be a signature of the phase transition and the Critical Point. Content Type Journal Article Category Elementary Particles and Fields Pages 700-706 DOI 10.1134/S1063778812060312 Authors M. V. Tokarev, Laboratory of High Energy Physics, JINR, Dubna, Russia I. Zborovský, Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež, Czech Republic Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We discuss a new type of reactions of a ϕ -meson production on hyperons, πY → ϕY and antikaons -KN → ϕY . These reactions are not suppressed according to Okubo-Zweig-Iizuka rule and can be a new efficient source of ϕ mesons in a nucleus-nucleus collision. We discuss how these reactions can affect the centrality dependence and the rapidity distributions of the ϕ yield. Content Type Journal Article Category Elementary Particles and Fields Pages 685-688 DOI 10.1134/S1063778812060221 Authors E. E. Kolomeitsev, Matej Bel University, Banská Bystrica, Slovakia B. Tomášik, Matej Bel University, Banská Bystrica, Slovakia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Introducing an infinite spatial lattice with box length a , a systematic expansion of the physical QCD Hamiltonian in λ = g −2/3 can be obtained, with the free part being the sum of the Hamiltonians of the quantum mechanics of spatially constant fields for each box, and interaction terms proportional to λ n with n spatial derivatives connecting different boxes. As an example, the energy of the vacuum and the lowest scalar glueball is calculated up to order λ 2 for the case of SU (2) Yang-Mills theory. Content Type Journal Article Category Elementary Particles and Fields Pages 729-731 DOI 10.1134/S1063778812060269 Authors H. -P. Pavel, Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    In this contribution the role of quantum fluctuations for the QCD phase diagram is discussed. This concerns in particular the importance of the matter back-reaction to the gluonic sector. The impact of these fluctuations on the location of the confinement/deconfinement and the chiral transition lines as well as their interrelation are investigated. Consequences of our findings for the size of a possible quarkyonic phase and location of a critical endpoint in the phase diagram are drawn. Content Type Journal Article Category Elementary Particles and Fields Pages 741-743 DOI 10.1134/S1063778812060270 Authors B. -J. Schaefer, Institut für Physik, Karl-Franzens-Universität, Graz, Austria Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We discuss some ideas resulting from a phenomenological relation recently declared between the tension of string connecting the static quark-antiquark pair and surface tension of corresponding cylindrical bag. This relation analysis leads to the temperature of vanishing surface tension coefficient of the QGP bags at zero baryonic charge density as T σ = 152.9 ± 4.5 MeV. We develop the view point that this temperature value is not a fortuitous coincidence with the temperature of (partial) chiral symmetry restoration as seen in the lattice QCD simulations. Besides, we argue that T σ defines the QCD (tri)critical endpoint temperature and claim that a negative value of surface tension coefficient recently discovered is not a sole result but is quite familiar for ordinary liquids at the supercritical temperatures. Content Type Journal Article Category Elementary Particles and Fields Pages 707-709 DOI 10.1134/S1063778812060075 Authors K. A. Bugaev, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine A. I. Ivanytskyi, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine E. G. Nikonov, Laboratory for Information Technologies, JINR, Dubna, Russia V. K. Petrov, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine A. S. Sorin, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia G. M. Zinovjev, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    A nonlocal chiral quark model is consistently extended beyond mean field using a strict 1/ N c expansion scheme. It is found that the 1/ N c corrections lead to a lowering of the temperature of the chiral phase transition in comparison with the mean-field result. On the other hand, near the phase transition the 1/ N c expansion breaks down and a nonperturbative scheme for the inclusion of mesonic correlations is needed in order to describe the phase transition region. Content Type Journal Article Category Elementary Particles and Fields Pages 738-740 DOI 10.1134/S106377881206004X Authors D. Blaschke, Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland M. Buballa, Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany A. E. Radzhabov, Institute for System Dynamics and Control Theory, Irkutsk, Russia M. K. Volkov, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Higher moments of event-by-event net-proton multiplicity distributions have been applied to search for the QCD critical point. Model results are used to provide a baseline for this search. The measured moment products, κσ 2 and Sσ of net-proton distributions, which are directly connected to the thermodynamical baryon number susceptibility ratio in Lattice QCD and Hadron Resonance Gas (HRG) model, are compared to the transport and thermal model results. We argue that a non-monotonic dependence of κσ 2 and Sσ as a function of beam energy can be used to search for the QCD critical point. Content Type Journal Article Category Elementary Particles and Fields Pages 676-678 DOI 10.1134/S1063778812060348 Authors Xiaofeng Luo, Institute of Particle Physics, Central China Normal University, Wuhan, China Bedangadas Mohanty, Variable Energy Cyclotron Center, Kolkata, India Hans Georg Ritter, Lawrence Berkeley National Laboratory, Berkeley, USA Nu Xu, Lawrence Berkeley National Laboratory, Berkeley, USA Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Applying the ideas and methods of condensed matter physics we calculate the quantum conductivity of quark matter in magnetic field. In strong field quantum conductivity is proportional to the square root of the field. Content Type Journal Article Category Elementary Particles and Fields Pages 698-699 DOI 10.1134/S1063778812060191 Authors B. O. Kerbikov, Institute for Theoretical and Experimental Physics, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The manifestations of axial anomaly and related effects in heavy-ion collisions are considered. Special role is played by various asymmetries. The azimuthal correlational asymmetries of neutron pairs at NICA/FAIR energy range may probe the global rotation of strongly interacting matter. The conductivity is related to the angular asymmetries of dilepton pairs. The strong magnetic field generated in heavy-ion collisions leads to the excess of soft dileptons flying predominantly in the scattering plane. Content Type Journal Article Category Elementary Particles and Fields Pages 748-752 DOI 10.1134/S1063778812060300 Authors O. V. Teryaev, Joint Institute for Nuclear Research, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We argue that a so far neglected dimensionless scale, the number of neighbors in a closely packed system, is relevant for the convergence of the large- N c expansion at high chemical potential. It is only when the number of colors is large w.r.t. this new scale ( ~ O (10)) that a convergent large- N c limit is reached. This provides an explanation as to why the large- N c expansion, qualitatively successful in vacuum QCD, fails to describe high baryo-chemical potential systems, such as nuclear matter. It also means that phenomenological claims about high-density matter based on large- N c extrapolations should be treated with caution. This work is based on [1]. Content Type Journal Article Category Elementary Particles and Fields Pages 713-717 DOI 10.1134/S1063778812060324 Authors G. Torrieri, FIAS, J.W. Goethe Universität, Frankfurt, Germany I. Mishustin, FIAS, J.W. Goethe Universität, Frankfurt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We investigate inhomogeneous chiral symmetry breaking phases in the phase diagram of the two-flavor Nambu-Jona-Lasinio model, concentrating on phases with one-dimensional modulations. It is found that the first-order transition line in the phase diagram of homogeneous phases gets completely covered by an inhomogeneous phase which is bordered by second-order transition lines. The inhomogeneous phase turns out to be remarkably stable when vector interactions are included. Content Type Journal Article Category Elementary Particles and Fields Pages 732-734 DOI 10.1134/S1063778812060063 Authors M. Buballa, Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany S. Carignano, Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany D. Nickel, Institute for Nuclear Theory, University of Washington, Seattle, USA Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    An extension of the standard concept of the statistical ensembles is suggested. Namely, the statistical ensembles with extensive quantities fluctuating according to an externally given distribution are introduced. Applications in the statistical models of multiple hadron production in high energy physics are discussed. Content Type Journal Article Category Elementary Particles and Fields Pages 753-758 DOI 10.1134/S1063778812050109 Authors M. I. Gorenstein, Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The kinetics of chiral transitions in quark matter is studied in a two-flavor Nambu-Jona-Lasinio model. We focus on the phase-ordering dynamics subsequent to a temperature quench from the massless quark phase to the massive quark phase. We study the dynamics by considering a phenomenological model (Ginzburg-Landau free-energy functional). The morphology of the ordering system is characterized by the scaling of the order-parameter correlation function. Content Type Journal Article Category Elementary Particles and Fields Pages 689-692 DOI 10.1134/S1063778812060282 Authors A. Singh, School of Physical Sciences, Jawaharlal Nehru University, New Delhi, India S. Puri, School of Physical Sciences, Jawaharlal Nehru University, New Delhi, India H. Mishra, Theory Division, Physical Research Laboratory, Ahmedabad, India Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We study the finite temperature behavior of light scalar and pseudoscalar meson properties in the context of a three-flavor nonlocal chiral quark model. The model includes mixing with active strangeness degrees of freedom, and takes care of the effect of gauge interactions by coupling the quarks with a background color field. We analyze the chiral restoration and deconfinement transitions, as well as the temperature dependence of meson masses, mixing angles, and decay constants. Content Type Journal Article Category Elementary Particles and Fields Pages 735-737 DOI 10.1134/S1063778812060154 Authors D. Gómez Dumm, IFLP, Departamento de Física, UNLP, La Plata, Argentina G. A. Contrera, CONICET, Buenos Aires, Argentina Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Along with π 0 and η mesons, a resonance structure in the invariant mass spectrum of two photons at M γγ = 360 ± 7 ± 9 MeV is observed in d C interactions at momentum 2.75 GeV/ c per nucleon. This resonance structure is not observed in p C collisions at the beam momentum 5.5 GeV/ c . The result obtained in the reaction d C is confirmed by the second experiment carried out on the deuteron beam at momentum 3.83 GeV/ c per nucleon with a copper target. Some other checks of the observed effect are presented. Content Type Journal Article Category Elementary Particles and Fields Pages 657-660 DOI 10.1134/S1063778812060026 Authors Kh. U. Abraamyan, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia M. I. Baznat, Institute of Applied Physics, Kishinev, Moldova A. V. Friesen, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia K. K. Gudima, Institute of Applied Physics, Kishinev, Moldova M. A. Kozhin, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia S. A. Lebedev, Laboratory of Information Technologies, JINR, Dubna, Russia M. A. Nazarenko, Moscow State Institute of Radioengineering, Electronics and Automation, Moscow, Russia S. A. Nikitin, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia G. A. Ososkov, Laboratory of Information Technologies, JINR, Dubna, Russia S. G. Reznikov, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia A. S. Sigov, Moscow State Institute of Radioengineering, Electronics and Automation, Moscow, Russia A. N. Sissakian, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia A. S. Sorin, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia V. D. Toneev, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We present recent results from the UrQMD hybrid approach investigating the influence of a deconfinement phase transition on the dynamics of hot and dense nuclear matter. In the hydrodynamic stage an equation of state that incorporates a critical end-point (CEP) in line with lattice data is used. The equation of state describes chiral restoration as well as the deconfinement phase transition. We compare the results from this new equation of state to results obtained by applying a hadron resonance gas equation of state, focusing on bulk observables. Furthermore we will discuss future improvements of the hydrodynamic model. This includes the formulation of chiral fluid dynamics to be able to study the effects of a chiral critical point as well as considerable improvements in terms of computational time which would open up possibilities for observables that require high statistics. Content Type Journal Article Category Elementary Particles and Fields Pages 759-763 DOI 10.1134/S1063778812050249 Authors J. Steinheimer, Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main, Germany M. Nahrgang, Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main, Germany J. Gerhard, Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main, Germany S. Schramm, Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main, Germany M. Bleicher, Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    In this paper we summarize the properties of ν dyn and discuss briefly how the results can be interpreted in terms of a simple pair-production model. The ideas are then illustrated in detail with a PYTHIA simulation study of forward-backward correlations in pp collisions. Content Type Journal Article Category Elementary Particles and Fields Pages 744-747 DOI 10.1134/S1063778812060087 Authors P. Christiansen, Experimental High-Energy Physics, Lund University, Lund, Sweden E. Haslum, Experimental High-Energy Physics, Lund University, Lund, Sweden E. Stenlund, Experimental High-Energy Physics, Lund University, Lund, Sweden Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Event-by-event fluctuations of the K/π , K/p , and p/π ratio in central AA collisions have been studied for SPS and RHIC energies. The Hadron-String-Dynamical transport approach (HSD) can qualitatively reproduce the measured excitation function for the K/π ratio fluctuations. The di-jet azimuthal correlations also have been investigated within the HSD model. We found that the suppression of the away-side jet in the hadronic mediumis not enough to explain the experimental data from RHIC. The additional suppression should be attributed to a quark-gluon plasma produced in heavy-ion collisions. Content Type Journal Article Category Elementary Particles and Fields Pages 683-684 DOI 10.1134/S1063778812060233 Authors V. P. Konchakovski, Institute for Theoretical Physics, Giessen University, Giessen, Germany E. L. Bratkovskaya, Institute for Theoretical Physics, Frankfurt University, Frankfurt, Germany W. Cassing, Institute for Theoretical Physics, Giessen University, Giessen, Germany M. I. Gorenstein, Bogolyobov Institute for Theoretical Physics, Kiev, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The dynamics of hot and dense nuclear matter is discussed from the microscopic transport point of view. The basic concepts of the Hadron-String-Dynamical transport model (HSD)—derived from Kadanoff-Baym equations in phase phase—are presented as well as “highlights” of HSD results for different observables in heavy-ion collisions from 100 A MeV (SIS) to 21 A TeV(RHIC) energies. Furthermore, a novel extension of the HSD model for the description of the partonic phase—the Parton—Hadron-String-Dynamics (PHSD) approach—is introduced. PHSD includes a nontrivial partonic equation of state—in line with lattice QCD—as well as covariant transition rates from partonic to hadronic degrees of freedom. The sensitivity of hadronic observables to the partonic phase is demonstrated for relativistic heavy-ion collisions from the FAIR/NICA up to the RHIC energy regime. Content Type Journal Article Category Elementary Particles and Fields Pages 679-682 DOI 10.1134/S1063778812060051 Authors E. L. Bratkovskaya, Institute for Theoretical Physics, Frankfurt University, Frankfurt, Germany W. Cassing, Institute for Theoretical Physics, Giessen University, Giessen, Germany O. Linnyk, Institute for Theoretical Physics, Frankfurt University, Frankfurt, Germany V. P. Konchakovski, Institute for Theoretical Physics, Giessen University, Giessen, Germany V. Voronyuk, FIAS, Frankfurt University, Frankfurt, Germany V. Ozvenchuk, Institute for Theoretical Physics, Frankfurt University, Frankfurt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    In this work we calculate the shear viscosity η in the quark-gluon plasma within a virial expansion approach with particular interest in the ratio of η to the entropy density s , i.e. η/s . We derive a realistic equation of state using a virial expansion approach which allows us to include the interactions between the partons in the deconfined phase. From the interaction we directly extract the effective coupling α V for the determination of η . Our results for η/s show a minimum near to T c very close with the lowest bound and, furthermore, in line with the experimental point from RHIC as well as with the lattice calculations. Content Type Journal Article Category Elementary Particles and Fields Pages 710-712 DOI 10.1134/S1063778812060257 Authors S. Mattiello, Institute for Theoretical Physics, University of Gießen, Gießen, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Project Thermalization is aimed to study the proton-proton interaction with high multiplicity of secondary particles. The region of high multiplicity is especially actual at present. We expect the manifestation of the secondary particle collective behavior at this region. The experimentally measured topological cross section was corrected for apparatus acceptance and detection efficiency. These data are in good agreement with gluon dominance model. The comparison with other models is also done and shows no essential deviations. There is evidence that Bose-Einstein condensation can formed at high total multiplicity region. Content Type Journal Article Category Elementary Particles and Fields Pages 664-667 DOI 10.1134/S106377881206021X Authors E. S. Kokoulina, LHEP, JINR, Dubna, Russia V. A. Nikitin, LHEP, JINR, Dubna, Russia Y. P. Petukhov, LHEP, JINR, Dubna, Russia A. Ya. Kutov, Department of Mathematics Komi SC UrD RAS, Syktyvkar, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We investigate the transverse momentum correlations of pairs of opposite charged pions near their production threshold. Through intermittency analysis, we search for power-law dependence on observation scale, as dictated by critical QCD. We analyze the data on the most central collisions in four A systems ( A = p , C, Si, Pb) at maximum SPS energy. We find a significant effect for the SiSi system approaching in size the critical QCD predictions as measured by the intermittency index ϕ 2 . Absence of this effect in the ( π − , π − ) sector of the SiSi system gives further support that the observed behavior in the isoscalar mode is of critical origin. Content Type Journal Article Category Elementary Particles and Fields Pages 661-663 DOI 10.1134/S1063778812060117 Authors N. Davis, Department of Physics, University of Athens, Athens, Greece N. G. Antoniou, Department of Physics, University of Athens, Athens, Greece F. K. Diakonos, Department of Physics, University of Athens, Athens, Greece Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The spinodal amplification of density fluctuations is treated perturbatively within dissipative fluid dynamics including not only shear and bulk viscosity but also heat conduction, as well as a gradient term in the local pressure. The degree of spinodal amplification is calculated along specific dynamical phase trajectories and the results suggest that the effect can be greatly enhanced by tuning the collision energy so that maximum compression occurs inside the region of spinodal instability. Content Type Journal Article Category Elementary Particles and Fields Pages 764-769 DOI 10.1134/S1063778812050195 Authors J. Randrup, Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California, USA Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The (3 + 1)-dimensional ideal hydrodynamics is used to simulate collisions of gold nuclei with bombarding energies from 1 to 160 GeV per nucleon. The initial state is represented by two cold Lorentzboosted nuclei. Two equations of state: with and without the deconfinement phase transition are used. We have investigated dynamical trajectories of compressed baryon-rich matter as functions of various thermodynamical variables. The parameters of collective flow and hadronic spectra are calculated. It is shown that presence of the deconfinement phase transition leads to increase of the elliptic flow and to flattening of proton rapidity distributions. Content Type Journal Article Category Elementary Particles and Fields Pages 776-780 DOI 10.1134/S1063778812050171 Authors I. N. Mishustin, Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany A. V. Merdeev, Russian Research Centre “Kurchatov Institute”, Moscow, Russia L. M. Satarov, Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Saturation in deep inelastic scattering (DIS) and deeply virtual Compton scattering (DVCS) is associated with a phase transition between the partonic gas, typical of moderate x and Q 2 , and partonic fluid appearing at increasing Q 2 and decreasing Bjorken x . We suggest the van der Waals equation of state to describe properly this phase transition. Content Type Journal Article Category Elementary Particles and Fields Pages 721-724 DOI 10.1134/S106377881206018X Authors L. L. Jenkovszky, BITP, Kiev, Ukraine A. O. Muskeyev, Taras Shevchenko Kiev National University, Kiev, Ukraine S. N. Yezhov, Taras Shevchenko Kiev National University, Kiev, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    A strongly coupled quark-gluon plasma (QGP) of heavy constituent quasi-particles is studied by a path-integral Monte-Carlo method. This approach is a quantum generalization of the classical molecular dynamics by Gelman, Shuryak, and Zahed. It is shown that this method is able to reproduce the QCD lattice equation of state. The results indicate that the QGP reveals liquid-like rather than gaslike properties. Quantum effects turned out to be of prime importance in these simulations. Content Type Journal Article Category Elementary Particles and Fields Pages 693-697 DOI 10.1134/S1063778812060130 Authors V. S. Filinov, Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia Yu. B. Ivanov, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany M. Bonitz, Institute for Theoretical Physics and Astrophysics, Christian Albrechts University, Kiel, Germany P. R. Levashov, Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia V. E. Fortov, Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    We suggest a duality between the standard (dynamical) and statistical distributions of partons in the nucleons. The temperature parameter entering into the statistical form for the quark distributions is estimated. It is found that this effective temperature is practically the same for the dependence on longitudinal and transverse momenta and, in turn, it is close to the freeze-out temperature in high-energy heavy-ion collisions. Content Type Journal Article Category Elementary Particles and Fields Pages 725-728 DOI 10.1134/S1063778812060099 Authors J. Cleymans, UCT-CERN Research Centre and Department of Physics, University of Cape Town, Observatory, South Africa G. I. Lykasov, JINR, Dubna, Russia A. S. Sorin, JINR, Dubna, Russia O. V. Teryaev, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    Event-by-event fluctuations of the chemical composition of the hadronic system produced in nuclear collisions are believed to be sensitive to properties of the transition between confined and deconfined strongly interacting matter. In this paper a new technique for the study of chemical fluctuation, the identity method, is introduced and its features are discussed. The method is tested using data on central PbPb collisions at 40 A GeV registered by the NA49 experiment at the CERN SPS. Content Type Journal Article Category Elementary Particles and Fields Pages 651-653 DOI 10.1134/S1063778812060245 Authors M. Maćkowiak, Faculty of Physics, Warsaw University of Technology, Warsaw, Poland Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The construction and performance of a modular hadron calorimeter for NA61 experiment at CERN are described. The calorimeter consists of individual lead/scintillator sandwich modules with the sampling satisfying the compensating condition. The light from the individual scintillator tiles is captured and transported with the WLS-fibers embedded in the scintillator grooves. The light readout is done by avalanche micro-pixel photodiodes. The construction ensures a fine transverse granulation of the calorimeter and a longitudinal segmentation of each module in 10 independent sections. The results of beam tests of the calorimeter prototype are presented. Content Type Journal Article Category Elementary Particles and Fields Pages 673-675 DOI 10.1134/S1063778812060142 Authors M. B. Golubeva, Institute for Nuclear Research RAS, Moscow, Russia F. F. Guber, Institute for Nuclear Research RAS, Moscow, Russia A. P. Ivashkin, Institute for Nuclear Research RAS, Moscow, Russia A. B. Kurepin, Institute for Nuclear Research RAS, Moscow, Russia V. N. Marin, Institute for Nuclear Research RAS, Moscow, Russia A. S. Sadovsky, Institute for Nuclear Research RAS, Moscow, Russia O. A. Petukhov, Institute for Nuclear Research RAS, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 6

Description:    The Multi-Purpose Detector (MPD) is designed to study heavy-ion collisions at the Nuclotron-based heavy Ion Collider fAcility (NICA) at JINR, Dubna. Its main components located inside a superconducting solenoid are a tracking system composed of a silicon microstrip vertex detector followed by a large volume time-projection chamber, a time-of-flight system for particle identification and a barrel electromagnetic calorimeter. A zero degree hadron calorimeter is designed specifically to measure the energy of spectators. In this paper, all parts of the apparatus are described and their tracking and particle identification parameters are discussed in some detail. Content Type Journal Article Category Elementary Particles and Fields Pages 598-601 DOI 10.1134/S1063778812050201 Authors O. V. Rogachevsky, Veksler and Baldin Laboratory on High Energy Physics, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    A new scientific program is proposed at the Joint Institute for Nuclear Research (JINR) in Dubna aimed at studies of hot and dense baryonic matter in the wide energy range from 2 GeV/u kinetic energy in fixed target experiments to Ö   s NN   = 4 - 11 GeV/u in the collider mode. To realize this program the development of the JINR accelerator facility in high-energy physics (HEP) has been started. This facility is based on the existing superconducting synchrotron—the Nuclotron. The program foresees both experiments at the beams extracted from the Nuclotron, and the construction of a heavy-ion collider—the Nuclotron-based Ion Collider fAcility (NICA) which is designed to reach the required parameters with an average luminosity of L = 10 27 cm −2 s −1 . Content Type Journal Article Category Elementary Particles and Fields Pages 542-545 DOI 10.1134/S1063778812050122 Authors V. D. Kekelidze, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia A. D. Kovalenko, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia I. N. Meshkov, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia A. S. Sorin, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia G. V. Trubnikov, Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    The Beam Energy Scan (BES) program at RHIC was launched with the specific aim to explore the QCD (Quantum Chromodynamics) Phase Diagram. Particular emphasis was given to the search for phase boundaries and the location of the Critical Point (CP). The first run with AuAu collisions at 7.7, 11.5, and 39 GeV took place in 2010, and the next one, with energies of 18 and 27 GeV, will start in a few months. The results of the first stage of the BES program obtained by the STAR (Solenoidal Tracker at RHIC) experiment are presented and discussed, as well as plans for the future of the program. Content Type Journal Article Category Elementary Particles and Fields Pages 602-606 DOI 10.1134/S1063778812050183 Authors G. Odyniec, Lawrence Berkeley National Laboratory, Berkeley, California, USA Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    Based on results obtained with event generators we have launched the core-corona model. It describes in a simplified way but quite successfully the centrality dependence of multiplicity and 〈 p t 〉 of identified particles observed in heavy-ion reactions at beam energies between Ö s = 17 and 200 GeV. Also the centrality dependence of the elliptic flow, υ 2 , for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single-particle spectra of K − and - p   measured by the PHENIX, STAR, and BRAHMS Collaborations. We find that also for these particles the analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. As for protons and K + , for each experience the data agree well with the prediction of the core-corona model but the values of the two necessary parameters depend on the experiments. We show as well that the average momentum as a function of the centrality depends in a very sensitive way on the particle species and may be quite different for particles which have about the same mass. Therefore the idea to interpret this centrality dependence as a consequence of a collective expansion of the system, as done in blast way fits, may be premature. Content Type Journal Article Category Elementary Particles and Fields Pages 640-645 DOI 10.1134/S1063778812050237 Authors C. Schreiber, SUBATECH, Université de Nantes, Nantes, France K. Werner, SUBATECH, Université de Nantes, Nantes, France J. Aichelin, SUBATECH, Université de Nantes, Nantes, France Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    The 1/ N c expansion classifies nuclearmatter, deconfined quark matter, and Quarkyonic matter in low temperature region. We investigate the realization of chiral symmetry in Quarkyonic matter by taking into account condensations of chiral particle-hole pairs. It is argued that chiral symmetry and parity are locally violated by the formation of chiral spirals, - y   exp ( 2 i m q z g 0 g z ) y . An extension to multiple chiral spirals is also briefly discussed. Content Type Journal Article Category Elementary Particles and Fields Pages 632-636 DOI 10.1134/S1063778812050134 Authors T. Kojo, RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, USA Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    Recent results on the system size dependence of net-baryon and hyperon production as measured at the CERNSPS are discussed. The observed N part dependences of yields, but also of dynamical properties, such as average transverse momenta, can be described in the context of the core corona approach. Other observables, such as antiproton yields and net-protons at forward rapidities, do not follow the predictions of this model. Possible implications for a search for a critical point in the QCD phase diagram are discussed. Event-by-event fluctuations of the relative core to corona source contributions might influence fluctuation observables (e.g., multiplicity fluctuations). The magnitude of this effect is investigated. Content Type Journal Article Category Elementary Particles and Fields Pages 571-575 DOI 10.1134/S1063778812050043 Authors C. Blume, Institut für Kernphysik, J.W. Goethe-Universität, Frankfurt am Main, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    I will review the current status of global strangeness production in relativistic heavy-ion collisions with particular emphasis on recent results from core-corona model. I will discuss its relevance for the detection of the onset of deconfinement. Content Type Journal Article Category Elementary Particles and Fields Pages 646-649 DOI 10.1134/S106377881205002X Authors F. Becattini, Dipartimento di Fisica dell’ Università di Firenze and INFN, Florence, Italy Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    We discuss phases of hot and dense hadronic matter using chiral Lagrangians. A two-flavored parity doublet model constrained by the nuclear matter ground state predicts chiral symmetry restoration. The model thermodynamics is shown within the mean-field approximation. A field-theoretical constraint on possible phases from the anomaly matching is also discussed. Content Type Journal Article Category Elementary Particles and Fields Pages 637-639 DOI 10.1134/S1063778812050225 Authors C. Sasaki, Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    The results from first series of measurements performed by the ALICE experiment at the LHC are presented. These measurements include the charged-particle pseudorapidity densities, multiplicity distributions and transverse momentum spectra obtained by analyzing the data collected in 2009 and 2010 in proton-proton collisions at three different center-of-mass energies of 0.9, 2.36, and 7 TeV. The results are compared to previous proton-antiproton data and to model predictions. Content Type Journal Article Category Elementary Particles and Fields Pages 580-584 DOI 10.1134/S1063778812050031 Authors I. Belikov, IPHC, Université de Strasbourg, CNRS-IN2P3, Strasbourg, France Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    With the High Acceptance Di-Electron Spectrometer (HADES) at GSI we have studied dilepton production in the few-GeV energy regime in various collisions systems, from elementary NN , over pA , up to the medium-heavy Ar + KCl system. We have thus confirmed the puzzling results of the former DLS Collaboration at the Bevalac. While we have traced the origin of the excess pair yield in CC collisions to elementary pp and pn processes, in our Ar + KCl data a contribution from the dense phase of the collision has been identified. Together with the e + e − pairs, we have also obtained in the Ar + KCl system at 1.76 A GeV a high-statistics data set on open and hidden strangeness, i.e. K ± , K s 0 , Λ, ϕ , and Ξ − , allowing for a comprehensive discussion of strangeness production in this system. Content Type Journal Article Category Elementary Particles and Fields Pages 576-579 DOI 10.1134/S1063778812050213 Authors A. Rustamov, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5

Description:    The CBM experiment is being designed to study strongly interacting matter at high densities with nuclear collisions up to 45 A GeV beam energy at the future FAIR centre. With interaction rates unprecedented in heavy-ion collisions, CBM will give access also to extremely rare probes and thus to the early stage of the collisions, in search for the first-order phase transition from confined to deconfinedmatter and the QCD critical point. The conceptual design of the experiment is consolidated, and the project has entered the R&D and technical design phase. We report on the project status, putting enphasis on recent progress and developments. Content Type Journal Article Category Elementary Particles and Fields Pages 585-588 DOI 10.1134/S1063778812050079 Authors V. Friese, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 75 Journal Issue Volume 75, Number 5