ALBERT

Description: A project of a Super Charm-Tau factory is being developed at the Budker Institute of Nuclear Physics (Siberian Branch, Russian Academy of Sciences) in Novosibirsk. The electron-positron collider to be employed will operate at c.m. energies in the range between 2 and 5 GeV at an unprecedentedly high luminosity of 10 35 cm −2 s −1 with a longitudinal electron polarization at the beam-interaction point. The main objective of experiments at the Super Charm-Tau factory is to study processes involving the production and properties of charmed quarks and tau leptons. A high luminosity of this setup will make it possible to obtain a statistical data sample that will be three to four orders of magnitude vaster than that from any other experiment performed thus far. Experiments at this setup are assumed to be sensitive to effects of new physics beyond the Standard Model. Investigations to be carried out at the Super-Charm-Tau factory will supplement future experiments at Super- B factories under construction in Italy and in Japan.

Description: The results obtained by measuring the forward-backward asymmetry ( A FB ) of Drell-Yan lepton pairs in proton-proton collisions at $\sqrt s $ = 7 TeV at the LHC are presented. This asymmetry is measured as a function of the dilepton mass and rapidity in the dielectron and dimuon channels. The values of A FB were found for invariant masses of dileptons in the range of 40 ⩽ M ll ⩽ 600 GeV. The results for the effective weak mixing angle that were deduced from data on dimuon production in Drell-Yan processes are also presented. The respective data sample was collected by using the Compact Muon Solenoid (CMS) detector over the period spanning the years 2010 and 2011. The measured asymmetry and the effective weak mixing are consistent with the respective Standard Model predictions.

Description: If the fundamental scale of multidimensional gravity is about one or several TeV units, microscopic black holes or objects referred to as string balls may be produced at the LHC. The most recent results obtained by the CMS Collaboration at the LHC from searches for such signals at the c.m. protoninteraction energy of 7 TeV and for an integrated luminosity of 4.7 fb −1 . Lower limits on the masses of objects of strongly acting gravity were set in the parameter region accessible to tests at the present time. Prospects for further research in this field are discussed.

Description: The AMoRE (Advanced Mo based Rare process Experiment) Collaboration is planning to employ 40 Ca 100 MoO 4 single crystals as a cryogenic Scintillation detector for studying the neutrinoless double-beta decay of the isotope 100 Mo. A simultaneous readout of phonon and scintillation signals is performed in order to suppress the intrinsic background. The planned sensitivity of the experiment that would employ 100 kg of 40 Ca 100 MoO 4 over five years of data accumulation would be T 1/2 0 ν = 3 × 10 26 yr, which corresponds to values of the effective Majorana neutrino mass in the range of 〈 m ν 〉 ∼ 0.02–0.06 eV.

Description: A holistic study of the lepton sector is fulfilled in the framework of rigorous restrictions by five input suppositions. All leptons are divided into three classes on the structure of their equations. They are singlets, doublets and quartets. The quartet states are the most interesting among them from the point of view of their properties and possible physical interpretations.

Description: The very weak neutrino-matter interactions are explained with the help of the gauge group contraction of the standard Electroweak Model. The mathematical contraction procedure is connected with the energy dependence of the interaction cross section for neutrinos and corresponds to the limiting case of the Electroweak Model at low energies. Contraction parameter is connected with the universal Fermi constant of weak interactions and neutrino energy as j 2 ( s ) = $\sqrt {G_F s} $ .

Description: After short introduction, we consider different aspects of the renormdynamics. Then scaling functions of the multiparticle production processes and corresponding stochastic dynamics are considered. Nonperturbative quasi-particle dynamics is considered on the base of the toy QCD- O ( N )-sigma model. Last section concerns to the NBD-Riemann zeta function connection.

Description: In this paper we present our results of the investigation of multiquark equations in the Nambu-Jona-Lasinio model with chiral symmetry of SU (2) group in the mean-field expansion. To formulate the mean-field expansion we have used an iteration scheme of solution of the Schwinger-Dyson equations with the fermion bilocal source. We have considered the equations for Green functions of the Nambu-Jona-Lasinio model up to third step for this iteration scheme. To calculate the high-order corrections to the mean-field approximation, we propose the method of the Legendre transformation with respect to the bilocal source, which allows effectively to take into account the symmetry constraints related with the chiral Ward identity. We discuss also the problem of calculating the multiquark functions in the mean-field expansion for Nambu-Jona-Lasinio-type models with other types of the multifermion sources.

Description: The results obtained in the CMS experiment at the LHC from searches for various physics phenomena beyond the Standard Model in proton-proton interactions at the c.m. energy of 7 TeV are presented. The respective analysis is based on data measured in the CMS experiment over the period spanning 2010 and 2011.

Description: The relativistic kinetic momentum operators are introduced in the framework of the Quantum Mechanics (QM) in the Relativistic Configuration Space (RCS). These operators correspond to the half of the non-Euclidean distance in the Lobachevsky momentum space. In terms of kinetic momentum operators the relativistic kinetic energy is separated as the independent term of the total Hamiltonian. This relativistic kinetic energy term is not distinguishing in form from its nonrelativistic counterpart. The role of the plane wave (wave function of the motion with definite value of momentum and energy) plays the generating function for the matrix elements of the unitary irreps of Lorentz group (generalized Jacobi polynomials). The kinetic momentum operators are the interior derivatives in the framework of the noncommutative differential calculus over the commutative algebra generated by the coordinate functions over the RCS.

Description: The effect of flavor day-night asymmetry is considered for solar neutrinos of energy about 1 MeV under the assumption that the electron-density distribution within the Earth is approximately piecewise continuous on the scale of the neutrino-oscillation length. In this approximation, the resulting asymmetry factor for beryllium neutrinos does not depend on the structure of the inner Earth’s layers or on the properties of the detector used. Its numerical estimate is on the order of −4 × 10 −4 , which is far beyond the reach of present-day experiments.

Description: A brief description of two low-background setups deployed at the Baksan Neutrino Observatory (Institute for Nuclear Research, Russian Academy of Sciences) and intended for searches for two types of double-beta decay of inert-gas isotopes—2 K capture on 78 Kr and the double-beta decay of 136 Xe—is given. The two setups in question have similar structures and employ identical large high-pressure copper proportional counters as detectors. Upon a treatment of data from measurements with krypton samples differing in the content of the isotope 78 Kr, the spectrum for an enriched sample revealed an excess of events at a statistical-significance level of about two standard deviations (2 σ ). If one attributes this excess to 2 K (2 ν ) capture on 78 Kr, the respective half-life is T 1/2 = 1.4 −0.7 +2.3 × 10 22 yr at a 90% C.L. A treatment of data from measurements with xenon samples differing in content of the isotope 136 Xe led to the appearance of an excess of events in the spectrum for an enriched sample at a statistical-significance level of about 2.2 σ . If one assumes that this excess is due to the two-neutrino double-beta decay of 136 Xe, then the respective half-life is T 1/2 = 5.8 −1.8 +4.7 × 10 21 yr.

Description: We show the results for the universal anomalous dimension γ uni ( j ) of Wilson twist-2 operators in the N = 4 Supersymmetric Yang-Mills theory.

Description: Dynamics of hadro-quarkonium system is formulated, based on the channel coupling of a light hadron ( h ) and heavy quarkonium $\left( {Q\bar Q} \right)$ to heavy-light mesons ( $Q_{\bar q}$ , $\bar Q_q$ ). Equations for hadro-quarkonium amplitudes and resonance positions are written explicitly, and numerically calculated for the special case of π ϒ( nS ) ( n = 1, 2, 3). It is also shown that the recently observed by Belle two peaks Z b (10610) and Z b (10650) are in agreement with the proposed theory. It is demonstrated that theory predicts peaks at the BB *, B * B * thresholds in all available π ϒ( nS ) channels.

Description: Results on searches for particles and phenomena beyond the Standard Model (new-physics effects) in the D0 experiment at the Tevatron accelerator (FNAL, USA) are examined. These results were obtained on the basis of a statistical sample corresponding to an integrated luminosity of 5 to 7 fb −1 and were published in 2010 and 2011.

Description: New results obtained in experiments at the Tevatron and associated with t - and b -quark and W -boson physics are presented and are compared with respective Standard Model predictions. Prospects of improving the precision of D0 and CDF results after a complete treatment of the accumulated data sample are discussed.

Description: Quadrupole-type collective excitations of even-even nuclei are analyzed. In this analysis, transverse γ vibrations of the nuclear surface are taken into account effectively, while longitudinal beta vibrations remain free. A potential energy of the exponential form is used for free surface longitudinal beta vibrations. The behavior of the energy levels of excited states in the ground-state, β , and γ bands of heavy nuclei is studied, and the predictive potential of the model used is demonstrated for transfermium nuclei.

Description: A significant asymmetry in baryon/antibaryon yields in the central region of high energy collisions is observed when the initial state has nonzero baryon charge. This asymmetry is connected with the possibility of baryon charge diffusion in rapidity space. Such a diffusion should decrease the baryon charge in the fragmentation region and translate into the corresponding decrease of the multiplicity of leading baryons. As a result, a new mechanism for Feynman scaling violation in the fragmentation region is obtained. Another numerically more significant reason for the Feynman scaling violation comes from the fact that the average number of cut Pomerons increases with initial energy. We present the quantitative predictions of the Quark-Gluon String Model for the Feynman scaling violation at LHC energies and at even higher energies that can be important for cosmic ray physics.

Description: A systematic study regarding the role of participant matter and spectator matter in nuclear stopping using isospin-dependent quantum molecular dynamics model is presented. The simulations have been carried out with soft equation of state along with the reduced isospin-dependent cross section to study the effect of different types and sizes of rapidity distributions on nuclear stopping for the whole colliding geometry with density-dependent symmetry energy. In addition to that, we attempt to investigate the role of isospin in heavy-ion collisions by calculating the individual contribution of neutrons and protons in nuclear stopping for different systems having different isotopic content.

Description: A generalization of Mie electrodynamics is considered. It includes a 8-spinor field and higher powers of the Mie invariant A μ A μ . Particular topological properties of 8-spinors are indicated and are associated with the existence of the remarkable Brioschi identity of eight squares, which permits deriving a natural 8-spinor unification of the Skyrme model of baryons and the Faddeev model of leptons, these particles being treated as topological solitons. Two types of soliton configurations admitted by the model are constructed. These are charged static and neutral lightlike (luxons) ones.

Description: Experimental data on the isomeric ratios of cross sections for products originating from the interaction of 12 C ions ( E 12 C = 26.4 GeV), protons ( E p = 3.65 GeV), and deuterons ( E d = 7.3 GeV) with targets enriched in the tin isotopes 112 Sn, 118 Sn, 120 Sn, and 124 Sn are presented. The dependence of the isomeric ratios on the interaction mechanism, projectile type and energy, and nuclear properties of the final-state nucleus are discussed. The dependence of the isomeric ratios on the degree of deformation of the product nucleus is also considered.

Description: We develop a new model of the QCD critical endpoint by matching the deconfinement phase transition line of quark-gluon bags with the similar line at which the bag surface tension coefficient vanishes. Unlike all previous studies of such models the deconfined phase in our approach is defined not by an essential singularity of the isobaric partition function but its simple pole. As an unexpected result we find out that the first-order phase transition which is usually defined by a discontinuity of the first derivative of the bag system pressure results from a discontinuity of the derivative of surface tension coefficient of quark-gluon bags.

Description: The cross sections of residual nuclei in the separated tin isotopes ( 112 Sn, 118 Sn, 120 Sn, and 124 Sn), irradiated with proton and deuteron beams with energy 3.65 GeV/nucleon, are investigated. Parametrization by ten parametric semi-empirical formula was conducted with the aim of determining the total cross sections and analyzing the measurement results. The dependence of total inelastic cross sections on the mass number of the target and the structure of the incoming particle was investigated via the comparison of the obtained data.

Description: The cross sections for the fission of 232 Th, 235,238 U, 237 Np, and 239 Pu target nuclei that was induced by 20- to 1000-MeV neutrons and protons were calculated. The respective calculations were based on the multiconfiguration-fission (MCFx) model, which was used to describe three basic stages of the interaction of high-energy nucleons with nuclei: direct processes (intranuclear cascade), equilibration of the emerging compound system, and the decay of the compound nucleus (statistical model). Fission barriers were calculated within the microscopic approach for isotopic chains formed by 15 to 20 nuclei of the required elements. The calculated fission cross sections were compared with available experimental data. It was shown that the input data set and the theoretical model used made it possible to predict satisfactorily cross section for nuclear fission induced by 20- to 1000-MeV nucleons.

Description: Since the pioneering discovery of the muon catalysis by Alvarez [L. W. Alvarez, K. Brander, F. S. Crawford, et al., Phys. Rev. 105 , 1127 (1957)], considerable efforts were aimed at observation of various fusion processes. Results of these studies facilitated understanding the properties of lightest nuclei and dynamics of low-energy fusion reactions. There still remain unsolved theoretical and experimental problems, especially in case of pt fusion.

Description: An α -cluster model is applied to study low-lying spectrum of the Λ 9 Be hypernucleus. The three-body αα Λ problem is numerically solved by the Faddeev equations in configuration space using phenomenological pair potentials. We found a set of the potentials that reproduces experimental data for the ground state (1/2 + ) binding energy and excitation energy of the 5/2 + and 3/2 + states, simultaneously. This set includes the Ali-Bodmer potential of the version “e” for αα and modified Tang-Herndon potential for α Λ interactions. The spin-orbit α Λ interaction is given by modified Scheerbaum potential. Low-lying energy levels are evaluated applying a variant of the analytical continuation method in the coupling constant. It is shown that the spectral properties of Λ 9 Be can be classified as an analog of 9 Be spectrum with the exception of several “genuine hypernuclear states”. This agrees qualitatively with previous studies. The results are compared with experimental data and new interpretation of the spectral structure is discussed.

Description: We revisit F π ( Q 2 ) and F Pγ ( Q 2 ), P = π, η, η′ , making use of the local-duality (LD) version of QCD sum rules. We give arguments that the LD sum rule provides reliable predictions for these form factors at Q 2 ≥ 5–6 GeV 2 , the accuracy of the method increasing with Q 2 in this region. For the pion elastic form factor, the well-measured data at small Q 2 give a hint that the LD limit may be reached already at relatively low values of momentum transfers, Q 2 ≈ 4–8 GeV 2 ; we therefore conclude that large deviations from LD in the region Q 2 = 20–50 GeV 2 seem very unlikely. The data on the ( η, η′ ) → γγ* form factors meet the expectations from the LD model. However, the BaBar results for the π 0 → γγ* form factor imply a violation of LD growing with Q 2 even at Q 2 ≈ 40 GeV 2 , at odds with the η, η′ case and with the general properties expected for the LD sum rule.

Description: The bound-state generating functional is constructed in gauge theories. This construction is based on the Dirac Hamiltonian approach to gauge theories, the Poincaré group classification of fields and their nonlocal bound states, and the Markov-Yukawa constraint of irreducibility. The generating functional contains additional anomalous creations of pseudoscalar bound states: para-positronium in QED and mesons inQCDin the two-gamma processes of the type of γ + γ → π 0 +para-positronium. The functional allows us to establish physically clear and transparent relations between the perturbativeQCD to its nonperturbative low-energy model by means of normal ordering and the quark and gluon condensates. In the limit of small current quark masses, the Gell-Mann-Oakes-Renner relation is derived from the Schwinger-Dyson and Bethe-Salpeter equations. The constituent quark masses can be calculated from a self-consistent nonlinear equation.

Description: The process of neutron-deuteron scattering at energies above the deuteron-breakup threshold is described within the three-body formalism of Faddeev equations. Use is made of the method of solving Faddeev equations in configuration space on the basis of expanding wave-function components in the asymptotic region in bases of eigenfunctions of specially chosen operators. Asymptotically, wave-function components are represented in the form of an expansion in an orthonormalized basis of functions depending on the hyperangle. This basis makes it possible to orthogonalize the contributions of elastic-scattering and breakup channels. The proposed method permits determining scattering and breakup parameters from the asymptotic representation of the wave function without reconstructing it over the entire configuration space. The scattering and breakup amplitudes for states of total spin S = 1/2 and 3/2 were obtained for the s -wave Faddeev equation.

Description: Based on a new method of the numerical construction of the three-body Schrödinger operator continuous spectrum eigenfunctions an analysis of the solutions of the problem of three identical particles on the axis with quickly decreasing repulsive pair potentials is offered. The initial problem is reduced to solving an inhomogeneous boundary problem for an elliptical partial differential equation in a twodimensional domain as a circle with radiation boundary conditions, with a ray approximation of the solution with diffraction corrections, contributing to a smoothness of a solution sought, being used. The approach offered allows a natural generalization for a case of slowly decreasing potentials of the Coulomb type and higher configuration space dimensions.

Description: The differential method proposed by the present authors earlier for the reduction of volume integrals in calculating the potential energy of a compound nucleus is generalized to the case of two interacting nuclei. The Coulomb interaction energy is obtained for the cases of a sharp and a diffuse boundary of nuclei, while the nuclear interaction energy is found only for nuclei with a sharp boundary, the finiteness of the nuclear-force range being taken into account. The present method of calculations permits reducing the time it takes to compute the potential energy at least by two orders of magnitude.

Description: The energy of stitching together the Maxwell and Fermi spectra is estimated on the basis of experimental data and the results of calculations carried out using the MCU-RFFI and MCU-5 codes.

Description: Basic experimental results confirming the existence a new cluster-decay type called collinear cluster tripartition (CCT) are presented. Decays of this type manifest themselves, in particular, as a two-dimensional region of a locally enhanced yield of fragments (bump) that corresponds to specific missing-mass values in the mass-mass distribution of fission fragments. One of the decay modes that contribute to the bump can be treated as a cluster-decay type that is new in relation to the well-known heavy-ion or lead radioactivity. The conclusions drawn from an analysis of correlation mass distributions are confirmed by the results obtained from neutron-gated data, measurements of the nuclear charge for CCT events, and the direct detection of new-decay products.

Description: The procedure of recovery of pin-by-pin energy-release fields for the BIPR-8 code and the algorithm of the BIPR-8 code which is used in nodal computation of the reactor core and on which the recovery of pin-by-pin fields of energy release is based are briefly described. The description and results of the verification using the module of recovery of pin-by-pin energy-release fields and the TVS-M program are given.

Description: Data on the form factors for K e 4 decay make it possible to fix the value of a parameter that is not determined by the theory itself and which is contained in the Lagrangian for the system formed by 0 + and 0 − mesons. This makes it possible to find the mass of the lightest σ meson: mσ = 663 MeV. As for the nature of spin-1 mesons, which also contribute to the form factors for K e 4 decay, data on them give no way to interpret spin-1 mesons as gauge bosons of chiral theory

Description: The results of a comparative analysis of channels involving the inclusive production of deuterons and tritons in 16 O p collisions at a projectile momentum of 3.25 GeV/ c per nucleon are presented. The mechanisms governing proton, deuteron, and triton production in the fragmentation of oxygen nuclei are found to be independent. It is shown that the observed proton-multiplicity correlations are associated predominantly with the character of the primary event of a proton-nucleon collision in 16 O p interactions. It is found that, in reactions involving triton production, the contributions of processes leading to an increase in the mean proton multiplicity ( n → p + π − and np → pn ) and processes leading to its decrease ( p → n + π + ) compensate each other.

Description: Calculation of 335 critical assemblies (benchmark experiments) with the core of highly enriched uranium and reflectors of various materials is performed. The statistical analysis of the results shows that, for all 16 materials studied, the absolute value of the most probable deviation of the calculated value of K eff from the experimental one does not exceed 0.005.

Description: Experimental proton single-particle energies in the vicinity of the Fermi energy for stable zinc and germanium isotopes are analyzed on the basis the dispersive optical model. The values found for the parameters of the dispersive optical potential are corrected with the aim of matching the total number of protons that is calculated with the aid of the function of Bardeen-Cooper-Schrieffer theory for the occupation probability for single-particle orbits with the charge number Z of the nucleus. The parameters of the dispersive optical potential are extrapolated on the basis of physically motivated arguments to the region of unstable isotopes in which the number N ranges between 34 and 50, and single-particle spectra are predicted by means of calculations with these parameters.

Description: The process of formation of an asymptotic distribution of the neutron flux density in the reactor systems after introducing different negative reactivities is considered. The impact of two factors after the reactivity introduction is evaluated: (1) nonuniformity of perturbation of core properties, on one hand, and (2) a sharp reduction in the density of prompt neutrons, which prevents the appearance of new delayed neutron emitters distributed in accordance with the “new” prompt neutron distribution, on the other hand. The results of calculations show that the errors of measuring the scram system effectiveness using the method of inverse solution of the kinetics equation are caused by the fact that, after the negative reactivity insertion, the sources of prompt and delayed neutrons have different spatial distributions. In the case of high negative reactivities, this difference remains while the system still has neutrons, which can be measured.

Description: According to the rules of nuclear safety, the measurements of the subcriticality of reactors should be carried out in the process of performing nuclear hazardous operations. An advanced technique of shooting source of neutrons is proposed to meet this requirement. As such a source, a pulsed neutron source (PNS) is used. In order to realize this technique, it is recommended to enable a PNS with a frequency of 1–20 Hz. The PNS is stopped after achieving a steady-state (on average) number of neutrons in the reactor volume. The change in the number of neutrons in the reactor volume is measured in time with an interval of discreteness of ∼0.1 s. The results of these measurements with the application of a system of point-kinetics equations are used in order to calculate the sought subcriticality. The basic idea of the proposed technique used to measure the subcriticality is elaborated in a series of experiments on the Kvant assembly. The conditions which should be implemented in order to obtain a positive result of measurements are formulated. A block diagram of the basic version of the experimental setup is presented, whose main element is a pulsed neutron generator.

Description:    The most recent results obtained from searches of particles and phenomena beyond the Standard Model (new physics) in the D0 and CDF experiments at the Tevatron accelerator (FNAL, USA) on the basis of statistics corresponding to the integrated luminosity of up to 4 fb −1 in 2009 are considered. Particular attention is given to the most recent results on searches for a supersymmetric Higgs boson. Content Type Journal Article Pages 477-486 DOI 10.1134/S1063778811020177 Authors A. V. Popov, 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 74 Journal Issue Volume 74, Number 3

Description:    Predictions of multidimensonal theories are analyzed, and the possibility of detecting signals from extra spatial dimensions in the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) is studied. Content Type Journal Article Pages 490-495 DOI 10.1134/S1063778811030161 Authors S. V. Shmatov, Joint Institute for Nuclear Research, Dubna, Moscow oblast, Russia CMS Collaboration Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The high energy behavior of the quark-gluon medium described by QCD equations is considered. Within the assumptions of the linear response theory the chromopermittivity of the medium is introduced and it is argued that it exceeds 1 at TeV energies. The dispersion equations show that the proper modes of the medium reveal instability and the parton currents traversing it induce the emission of Cherenkov gluons. Content Type Journal Article Pages 487-489 DOI 10.1134/S1063778811020098 Authors I. M. Dremin, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    A brief survey of the present-day status of the problem of multidimensional-black-hole production at accelerators according to models featuring large extra dimensions is given. The respective production cross section and the Hawking temperature and decay rate are estimated versus model parameters. Possible flaws and assumptions whose accurate inclusion can reduce significantly the probability of blackhole production at accelerators in relation to earlier optimistic estimates are also discussed. Content Type Journal Article Pages 496-504 DOI 10.1134/S1063778811020190 Authors M. V. Savina, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The spectra of neutrons from the ( p, n ) reactions on 47 Ti, 48 Ti, 49 Ti, 53 Cr, and 54 Cr nuclei were measured in the proton-energy range 7–11 MeV. The measurements were performed with the aid of a fast-neutron spectrometer by the time-of-flight method over the base of the EGP-15 tandem accelerator of the Institute for Physics and Power Engineering (IPPE, Obninsk). Owing to a high resolution and a high stability of the time-of-flight spectrometer used, low-lying discrete levels could be identified reliably along with a continuum section of neutron spectra. An analysis of measured data was performed within the statistical equilibrium and preequilibrium models of nuclear reactions. The relevant calculations were performed by using the exact formalism of Hauser-Feshbach statistical theory supplemented with the generalized model of a superfluid nucleus, the back-shifted Fermi gas model, and the Gilbert-Cameron composite formula for the nuclear level density. The nuclear level densities for 47 V, 48 V, 49 V, 53 Mn, and 54 Mn were determined along with their energy dependences and model parameters. The results are discussed together with available experimental data and recommendations of model systematics. Content Type Journal Article Pages 335-340 DOI 10.1134/S1063778811030173 Authors B. V. Zhuravlev, Institute for Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249020 Russia A. A. Lychagin, Institute for Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249020 Russia N. N. Titarenko, Institute for Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249020 Russia V. G. Demenkov, Institute for Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249020 Russia V. I. Trykova, Institute for Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249020 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The approach to the Z → γψ and Z → γ ϒ decay study is presented in detail, based on the sum rules for the Z → c - c   → γγ * and Z → b - b   → γγ * amplitudes and their derivatives. The branching ratios of the Z → γψ and Z → γ ϒ decays are calculated for different hypotheses on saturation of the sum rules. The lower bounds of Σ ψ BR( Z → γψ ) = 1.95 × 10 −7 and Σ υ BR( Z → γ ϒ) = 7.23 × 10 −7 are found. Deviations from the lower bounds are discussed, including the possibility of BR( Z → γJ / ψ (1 S )) ∼ BR( Z → γ ϒ(1 S )) ∼ 10 −6 , that could be probably measured in LHC. The angular distributions in the Z → γψ and Z → γ ϒ decays are also calculated. Content Type Journal Article Pages 437-445 DOI 10.1134/S1063778811030021 Authors N. N. Achasov, Sobolev Institute of Mathematics, Siberian Division, Russina Academy of Sciences, Novosibirsk, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    We use the nonperturbative quark-antiquark potential derived within the Field Correlator Method and the screened Coulomb potential to calculate binding energies and melting temperatures of heavy mesons and baryons in the deconfined phase of quark-gluon plasma. Content Type Journal Article Pages 470-476 DOI 10.1134/S1063778811030148 Authors I. M. Narodetskii, Institute of Theoretical and Experimental Physics, Moscow, Russia Yu. A. Simonov, Institute of Theoretical and Experimental Physics, Moscow, Russia A. I. Veselov, Institute of Theoretical and Experimental Physics, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The possibility of measuring cross sections for the production of J/ψ mesons in fixed-target experiments with the proton and ion beams of the Large Hadron Collider (LHC) at CERN (Switzerland) is considered. At the present time, measurements of charmonium production in proton-proton collisions at an energy of 7 TeV have begun at LHC. Previously, the production of J/ψ and ψ′ mesons was studied in the NA38, NA50, and NA60 fixed-target experiments with beams of the CERN synchrotron (SPS) and in the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC, Brookhaven National Laboratory, USA). A normal nuclear absorption of J/ψ mesons in proton-nucleus collisions and an enhanced, anomalous, suppression of the production of charmonium states in central collisions of relativistic nuclei were observed. At the present time, there are no theoretical models that could describe the entire body of experimental data. Measurements over a broad interval of proton and ion energies are required. Measurements of charmonium production using LHC beams with fixed targets in the energy range between the SPS and RHIC energies-a beam of 7-TeV protons (√ s = 114.6 GeV) and a beam of 2.75-TeV/nucleon lead ions (√ s = 71.8 GeV)-will provide an additional possibility for studying the charmonium-production mechanism. Estimates of the geometric acceptance, luminosity, and counting rate for the production of J/ψ mesons are presented. Content Type Journal Article Pages 446-452 DOI 10.1134/S1063778811030124 Authors A. B. Kurepin, Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312 Russia N. S. Topilskaya, Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312 Russia M. B. Golubeva, Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312 Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    For baryons composed by the light quarks ( q = u, d ) we write spectral integral equation using the notion of two diquarks: (i) axial-vector state, D 1 1 , with the spin S D = 1 and isospin I D = 1 and (ii) scalar one, D 0 0 , with the spin S D = 0 and isospin I D = 0. We present spectral integral equations for the qD 0 0 and qD 1 1 states taking into account quark-diquark confinement interaction. Content Type Journal Article Pages 418-425 DOI 10.1134/S1063778811030045 Authors A. V. Anisovich, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, St. Petersburg oblast, Russia V. V. Anisovich, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, St. Petersburg oblast, Russia M. A. Matveev, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, St. Petersburg oblast, Russia V. A. Nikonov, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, St. Petersburg oblast, Russia A. V. Sarantsev, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, St. Petersburg oblast, Russia T. O. Vulfs, Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, St. Petersburg oblast, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The effect of the dimensionality of the dynamical model used on the fission rate and mean time is studied within a multidimensional stochastic approach to fission dynamics. These features of fission of excited compound nuclei are calculated within four-dimensional Langevin dynamics, where the coordinate K , which is the projection of the total angular momentum onto the symmetry axis of the nucleus being considered, is taken into account in addition to three collective shape coordinates introduced on the basis of the { c, h, a } parametrization. The evolution of this orientation degree of freedom ( K mode) is described in terms of the Langevin equation in the overdamped regime. The effect of the orientation degree of freedom on the rate and mean time of fission of compound nuclei is studied. The introduction of the orientation degree of freedom is shown to lead to a substantial decrease in the fission rate and, accordingly, to an increase in the mean fission time upon going over from the three- to the four-dimensional model. The reactions induced by the interaction of 14 N and 16 O projectile ions with 197 Au, 208 Pb, 232 Th, and 238 U nuclei at energies above the Coulomb fusion barrier are considered. The effect of the increase in the fission time because of the introduction of the K mode is so strong that it compensates almost completely for an opposite effect from introducing, in the one-dimensional model, the second and third collective coordinates that take into account, respectively, the evolution of the neck in the nuclear shape and the mass asymmetry. Ultimately, the difference between the results in the four- and one dimensional problems is not more than 5 to 25% for the reactions considered here. Content Type Journal Article Pages 341-351 DOI 10.1134/S1063778811030033 Authors Yu. A. Anischenko, Omsk State University, pr. Mira 55a, Omsk, 644077 Russia A. E. Gegechkori, 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 74 Journal Issue Volume 74, Number 3

Description: Future publications Content Type Journal Article Pages 505-506 DOI 10.1134/S1063778811030100 Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    Within the potential cluster model where orbital states are classified according to Young diagrams and isospin, astrophysical S factors are considered for radiative proton capture by 3 H and 7 Li nuclei at energies of up to 1 and 10 keV, respectively. It is shown that the approach used, which takes into account only the E 1 transition for the p 3 H capture process, makes it possible to describe well the most recent experimental data at c.m. energies in the range from 50 keV to 5MeV. In the case of proton capture by 7 Li nuclei, an M 1 processwas taken into account in addition to the E 1 transition, and a general behavior and the magnitude of the experimental S factor could be correctly reproduced owing to this at astrophysical energies, including the region around the resonance at 0.441 MeV (in the laboratory frame). Content Type Journal Article Pages 358-370 DOI 10.1134/S1063778811030094 Authors S. B. Dubovichenko, Fessenkov Astrophysical Institute, NC SRT NSA RK, Almaty, 050020 Republic of Kazakhstan Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The models leading to a high abundance of antimatter in the universe are discussed. Special attention is payed to the model of antimatter creation in the form of compact stellar-like objects. Such objects can contribute significantly to the cosmological dark matter. Observational signatures of antimatter in the Galaxy are discussed. Content Type Journal Article Pages 462-469 DOI 10.1134/S1063778811030082 Authors A. D. Dolgov, ITEP, Moscow, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The correlation between the deuteron quadrupole moment Q , the deuteron asymptotic D/S ratio η , and the deuteron asymptotic normalization constant AS is studied. For local nucleon-nucleon potentials, it was found that the quantities Q/η and A S 2 are related by a linear equation. Owing to this, the deuteron quadrupole moment Q can be determined from known values of AS and η with an absolute precision of about 0.0003 fm 2 . The inclusion of the correction for meson-exchange currents and the use of the experimental neutron-proton phase shifts from the GWU partial-wave analysis made it possible to estimate the deuteron quadrupole moment at Q = 0.2852 fm 2 , which is in good agreement with experimental data. Content Type Journal Article Pages 352-357 DOI 10.1134/S1063778811030069 Authors V. A. Babenko, Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Metrologicheskaya ul. 14b, 03680 Kyiv, Ukraine N. M. Petrov, Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Metrologicheskaya ul. 14b, 03680 Kyiv, Ukraine Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The WA89 Collaboration experimental data on production of Λ, Σ − , Σ + , Ξ − , Ω − baryons, - L   and - X   +   antibaryons in Σ − collisions with C and Cu targets at 345 GeV/ c ( Ö   s S N   ≈ 25.5 GeV) in the frame of the Quark-Gluon String Model is described. The comparison of the theoretical results with the experimental data is discussed. Finally, some relations among the values of the model parameters obtained with the help of quark combinatorics are presented. Content Type Journal Article Pages 426-436 DOI 10.1134/S1063778811030057 Authors G. H. Arakelyan, Yerevan Physics Institute, Yerevan, Armenia A. B. Kaidalov, Institute of Theoretical and Experimental Physics, Moscow, Russia C. Merino, Departamento de Física de Partículas and Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, Galiza, Spain Yu. M. Shabelski, Petersburg Nuclear Physics Institute, RAS, Gatchina, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 3

Description:    The classical generalized Kepler-Coulomb potential, introduced by Verrier and Evans, corresponds to a quantum superintegrable system, with quadratic and quartic integrals of motion. In this paper we show that the algebra of the integrals is a quadratic ternary algebra, i.e a quadratic extension of a Lie triple system. Content Type Journal Article Pages 1083-1089 DOI 10.1134/S1063778811060299 Authors Y. Tanoudis, Mathematics Department, Aristotle University of Thessaloniki, Thessaloniki, Greece C. Daskaloyannis, Mathematics Department, Aristotle University of Thessaloniki, Thessaloniki, Greece Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 7

Description:    A new measurement of differential cross sections for elastic p 6 Li scattering in the energy range 0.35–1.2 MeV was performed. A partial-wave analysis of the data obtained in this way was carried out, and potentials simulating the p 6 Li interaction were constructed. Various experiments devoted to studying elastic p 6 Li scattering over the broad energy range of 0.5–50 MeV were analyzed on the basis of the optical model. By using the potentials obtained from the partial-wave analysis, the possibility of describing the astrophysical S factor for radiative proton capture on 6 Li at low energies was considered within the potential cluster model involving forbidden states. Content Type Journal Article Pages 984-1000 DOI 10.1134/S1063778811050073 Authors S. B. Dubovichenko, Fessenkov Astrophysical Institute, National Center of Space Research and Technology, National Space Agency of the Republic of Kazakhstan, Kamenskoe plateau, Observatory 23, Almaty, 050022 Republic of Kazakhstan N. Burtebaev, Institute of Nuclear Physics, National Nuclear Center of Republic of Kazakhstan, ul. Ibragimova 1, Almaty, 050032 Republic of Kazakhstan D. M. Zazulin, Institute of Nuclear Physics, National Nuclear Center of Republic of Kazakhstan, ul. Ibragimova 1, Almaty, 050032 Republic of Kazakhstan Zh. K. Kerimkulov, Institute of Nuclear Physics, National Nuclear Center of Republic of Kazakhstan, ul. Ibragimova 1, Almaty, 050032 Republic of Kazakhstan A. S. A. Amar, Al-Farabi Kazakh National University, pr. Al-Farabi 71, Almaty, 050038 Republic of Kazakhstan Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 7

Description:    It is shown that the Strutinsky-Denisov induced polarization mechanism leads to the appearance of the prompt electric dipole radiation from fission fragments of 235 Uby thermal neutrons in the domain of around 5 MeV. The probability of the radiation is at the level of 0.001 per fission, which is in agreement with experiment. The angular distribution exhibits left-right asymmetry with respect to the direction of the neutron polarization axis. That means that the emission of gamma quanta at the given angle depends on the neutron polarization. The asymmetry is at the level of 10 −3 . The study of this effect will give a direct information about the scission configuration, nuclear viscosity, and dissipation properties of the collective energy of the surface vibration in fragments with large amplitude. This will give a complete picture of the process of snapping back the nuclear surface. Content Type Journal Article Pages 951-957 DOI 10.1134/S1063778811050127 Authors F. F. Karpeshin, St. Petersburg State University, St. Petersburg, Russia Journal Physics of Atomic Nuclei Online ISSN 1562-692X Print ISSN 1063-7788 Journal Volume Volume 74 Journal Issue Volume 74, Number 7

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