ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (517)
  • Springer  (517)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • National Academy of Sciences
  • Nature Publishing Group
  • 2015-2019  (345)
  • 2005-2009  (172)
  • 1980-1984
  • 2017  (345)
  • 2008  (172)
  • 1984
  • European Physical Journal A  (99)
  • 1690
  • Physics  (517)
Collection
  • Articles  (517)
Source
Publisher
  • Springer  (517)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • National Academy of Sciences
  • Nature Publishing Group
Years
  • 2015-2019  (345)
  • 2005-2009  (172)
  • 1980-1984
Year
Journal
Topic
  • Physics  (517)
  • 1
    facet.materialart.
    Unknown
    Lattice study of D and D s meson form factors with twisted boundary conditions (2017)
    Springer
    Details
    Publication Date: 2017-03-21
    Description: . We present results on the D and \(D_{s}\) meson electromagnetic form factors using \(N_{f}=2\) twisted mass Lattice Quantum Chromodynamics (LQCD) gauge configurations. In this simulation, to access spatial components of momenta that are different from the integer multiples of \(2\pi /L\) , we apply twisted boundary conditions to compute corresponding correlation functions. Electromagnetic form factors with more small four-momentum transfer are determined, and further we fit the electromagnetic charge radius for D and \(D_{s}\) mesons, respectively.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    The new elastic scattering measurements of TOTEM --Are there hints for asymptotics? (2017)
    Springer
    Details
    Publication Date: 2017-03-21
    Description: . We point out to another indication of the black-disk limit exceeding in hadron interactions found in the recent impact parameter analysis performed by the TOTEM Collaboration at \(\sqrt{s}=8\) TeV and emphasize that this observation might be interpreted as a confirmation of the reflective scattering mode appearance at the LHC energies.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Compton imaging with a highly-segmented, position-sensitive HPGe detector (2017)
    Springer
    Details
    Publication Date: 2017-02-10
    Description: . A Compton camera based on a highly-segmented high-purity germanium (HPGe) detector and a double-sided silicon-strip detector (DSSD) was developed, tested, and put into operation; the origin of \(\gamma\) radiation was determined successfully. The Compton camera is operated in two different modes. Coincidences from Compton-scattered \(\gamma\) -ray events between DSSD and HPGe detector allow for best angular resolution; while the high-efficiency mode takes advantage of the position sensitivity of the highly-segmented HPGe detector. In this mode the setup is sensitive to the whole \( 4\pi\) solid angle. The interaction-point positions in the 36-fold segmented large-volume HPGe detector are determined by pulse-shape analysis (PSA) of all HPGe detector signals. Imaging algorithms were developed for each mode and successfully implemented. The angular resolution sensitively depends on parameters such as geometry, selected multiplicity and interaction-point distances. Best results were obtained taking into account the crosstalk properties, the time alignment of the signals and the distance metric for the PSA for both operation modes. An angular resolution between \( 13.8^{\circ}\) and \( 19.1^{\circ}\) , depending on the minimal interaction-point distance for the high-efficiency mode at an energy of 1275 keV, was achieved. In the coincidence mode, an increased angular resolution of \( 4.6^{\circ}\) was determined for the same \(\gamma\) -ray energy.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Influence of broken flavor and C and P symmetry on the quark propagator (2017)
    Springer
    Details
    Publication Date: 2017-02-10
    Description: . Embedding QCD into the standard model breaks various symmetries of QCD explicitly, especially C and P . While these effects are usually perturbatively small, they can be amplified in extreme environments like merging neutron stars or by the interplay with new physics. To correctly treat these cases requires fully backcoupled calculations. To pave the way for later investigations of hadronic physics, we study the QCD quark propagator coupled to an explicit breaking. This substantially increases the tensor structure even for this simplest correlation function. To cope with the symmetry structure, and covering all possible quark masses, from the top quark mass to the chiral limit, we employ Dyson-Schwinger equations. While at weak breaking the qualitative effects have similar trends as in perturbation theory, even moderately strong breakings lead to qualitatively different effects, non-linearly amplified by the strong interactions.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Neutral-current weak interactions at an EIC (2017)
    Springer
    Details
    Publication Date: 2017-03-18
    Description: . A simulation study of measurements of neutral current structure functions of the nucleon at the future high-energy and high-luminosity polarized electron-ion collider (EIC) is presented. A new series of \(\gamma\) - Z interference structure functions, \(F_{1}^{\gamma Z}\) , \(F_{3}^{\gamma Z}\) , \(g_{1}^{\gamma Z}\) , \(g_{5}^{\gamma Z}\) become accessible via parity-violating asymmetries in polarized electron-nucleon deep inelastic scattering (DIS). Within the context of the quark-parton model, they provide a unique and, in some cases, yet-unmeasured combination of unpolarized and polarized parton distribution functions. The uncertainty projections for these structure functions using electron-proton collisions are considered for various EIC beam energy configurations. Also presented are uncertainty projections for measurements of the weak mixing angle \( \sin^{2} \theta_{W}\) using electron-deuteron collisions which cover a much higher \( Q^{2}\) than that accessible in fixed target measurements. QED and QCD radiative corrections and effects of detector smearing are included with the calculations.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Probing the exotic structure of 8 B by its elastic scattering and breakup reaction on nuclear targets (2017)
    Springer
    Details
    Publication Date: 2017-02-18
    Description: . The structure of the exotic 8 B nucleus is studied by means of elastic scattering, as well as its breakup on nuclear targets. We present microscopic calculations of the optical potentials (OPs) and cross sections of elastic scattering of 8 B on 12 C, 58 Ni, and 208 Pb targets at energies \(20 〈 E 〈 170\) MeV. The density distributions of 8 B obtained within the variational Monte Carlo (VMC) model and the three-cluster model (3CM) are used to construct the potentials. The real part of the hybrid OP is calculated using the folding model with the direct and exchange terms included, while the imaginary part is obtained on the base of the high-energy approximation (HEA) and also taken to be equal to the microscopic real part of the OP. In this model the only free parameters are the depths of the real and imaginary parts of OP obtained by fitting the elastic scattering experimental data. A dependence of their values on the model density of 8 B is found. In addition, the cluster model, in which 8 B consists of a p -halo and the 7 Be core, is applied to calculate the breakup cross sections of the 8 B nucleus on 9 Be, 12 C, and 197 Au targets, as well as momentum distributions of 7 Be fragments, and a comparison with the existing experimental data is made.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Charmed particles production in pA -interactions at $\surd s = 11.8$ √ s = 11 . 8 GeV (2017)
    Springer
    Details
    Publication Date: 2017-03-04
    Description: . The results of the SERP-E-184 experiment at the U-70 accelerator (IHEP, Protvino) are presented. Interactions of the 70GeV proton beam with carbon, silicon and lead targets were studied to detect decays of charmed \(D^{0}\) , \(\bar{D}^{0}\) , \(D^{+}\) , \(D^{-}\) mesons and \(\Lambda_{c}^{+}\) baryon near their production threshold. Measurements of lifetimes and masses have shown a good agreement with PDG data. The inclusive cross-sections of charm production and their A -dependences have been obtained. The yields of these particles are compared with the theoretical predictions and the data of other experiments. The measured cross-section of the total open charm production ( \(\sigma_{\rm tot}(c\bar{c}) = 7.1 \pm 2.3({\rm stat}) \pm 1.4({\rm syst})\) μb/nucleon) at the collision c.m. energy \(\surd s = 11.8\) GeV is well above the QCD model predictions. The contributions of different kinds of charmed particles to the total cross-section of the open charm production in proton-nucleus interactions vary with energy.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Energy loss as the origin of a universal scaling law of the elliptic flow (2017)
    Springer
    Details
    Publication Date: 2017-03-04
    Description: . It is shown that the excellent scaling of the elliptic flow found for all centralities, species and energies from RHIC to the LHC for p T less than the saturation momentum is a consequence of the energy lost by a parton interacting with the color field produced in a nucleus-nucleus collision. In particular, the deduced shape of the scaling curve describes correctly all the data. We discuss the possible extensions to higher p T , proton-nucleus and proton-proton collisions as well as higher harmonics.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Relativistic extension of the complex scaled Green's function method for resonances in deformed nuclei (2017)
    Springer
    Details
    Publication Date: 2017-03-04
    Description: . We have extended the complex scaled Green's function method to the relativistic framework describing deformed nuclei with the theoretical formalism presented in detail. We have checked the applicability and validity of the present formalism for exploration of the resonances in deformed nuclei. Furthermore, we have studied the dependences of resonances on nuclear deformations and the shape of potential, which are helpful to recognize the evolution of resonant levels from stable nuclei to exotic nuclei with axially quadruple deformations.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Determining the dominant partial wave contributions from angular distributions of single- and double-polarization observables in pseudoscalar meson photoproduction (2017)
    Springer
    Details
    Publication Date: 2017-05-09
    Description: . This work presents a simple method to determine the significant partial wave contributions to experimentally determined observables in pseudoscalar meson photoproduction. First, fits to angular distributions are presented and the maximum orbital angular momentum L max needed to achieve a good fit is determined. Then, recent polarization measurements for \(\gamma p \rightarrow \pi^{0} p\) from ELSA, GRAAL, JLab and MAMI are investigated according to the proposed method. This method allows us to project high-spin partial wave contributions to any observable as long as the measurement has the necessary statistical accuracy. We show, that high precision and large angular coverage in the polarization data are needed in order to be sensitive to high-spin resonance states and thereby also for the finding of small resonance contributions. This task can be achieved via interference of these resonances with the well-known states. For the channel \(\gamma p \rightarrow \pi^{0} p\) , those are the \(N(1680)\frac{5}{2}^{+}\) and \(\Delta(1950)\frac{7}{2}^{+}\) , contributing to the F -waves.
    Print ISSN: 1434-6001
    Electronic ISSN: 1434-601X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...