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Nuclear Theory·nucl-th

Thursday·March 17, 2016

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 01

    [Submitted on 16 Mar 2016]

    Mean-field study of C+C fusion

    Le Hoang Chien · Do Cong Cuong · Dao T. Khoa

    The nuclear mean-field potential arising from the C+C interaction at the low energies relevant for the astrophysical carbon burning process has been constructed within the double-folding model, using the realistic nuclear ground-state density of the C nucleus and the effective M3Y nucleon-nucleon (NN) interaction constructed from the G-matrix of the Paris (free) NN potential. To explore the nuclear medium effect, both the original density independent M3Y-Paris interaction and its density dependent CDM3Y6 version have been used in the folding model calculation of the C+C potential. The folded potentials at the different energies were used in the optical model description of the elastic C+C scattering at the energies around and below the Coulomb barrier, as well as in the barrier penetration model to estimate the fusion cross section and astrophysical factor of the C+C reactions at the low energies. The obtained results are in good agreement with experimental data over a wide range of energies.

    Comments:
    Communications in Physics, Vol. 25, No. 3 (2015), pp. 265-274
    Subjects:
    Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR); Nuclear Experiment (nucl-ex)
    arXiv:
    1603.04946 [pdf]
    Commun.in Phys.(2015)·1 citation
  2. 02

    [Submitted on 16 Mar 2016]

    Event shape analysis in ultrarelativistic nuclear collisions

    Renata Kopecna🇨🇿 · Boris Tomasik🇨🇿

    We present a novel method for sorting events. So far, single variables like flow vector magnitude were used for sorting events. Our approach takes into account the whole azimuthal angle distribution rather than a single variable. This method allows us to determine the good measure of the event shape, providing a multiplicity-independent insight. We discuss the advantages and disadvantages of this approach, the possible usage in femtoscopy, and other more exclusive experimental studies.

    Comments:
    Presented at XI Workshop on Particle Correlations and Femtoscopy, Warsaw 2015
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1603.04997 [pdf]
    Acta Phys.Polon.Supp.(2016)·0 citations
  3. 03

    [Submitted on 16 Mar 2016]

    Is the magnetic field making the inner crust of neutron stars more heterogeneous?

    Jianjun Fang · Sidney Avancini · Helena Pais · Constança Providência

    We study the effect of strong magnetic fields, of the order of G, on the extension of the crust of magnetized neutron stars. The dynamical instability region of neutron-proton-electron () matter at subsaturation densities and the mode with the largest growth rate are determined within a relativistic mean field model. It is shown that a strong magnetic field has a large effect on the instability region, defining the crust-core transition as a wide density range.

    Comments:
    5 pages, 2 figures. Figures 2 have been changed and the corresponding discussion completed. Accepted for publication in Phys. Rev. C as Rapid Communication
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1603.05000 [pdf]
    PRC(2016)·24 citations
  4. 04

    [Submitted on 16 Mar 2016]

    Counterintuitive Behaviors in Configuration Mixing

    Xiaofei Yu · Larry Zamick · Shadow Robinson

    By starting with a simple configurations of 2 neutrons in a single j shell we hare able to learn the effects of high lying configurations on physical properties such as nuclear magnetic g factors. Some counterintuitive results are found when both high lying spin orbit partners are allowed to admix with the basic configuration.

    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex); Atomic Physics (physics.atom-ph)
    arXiv:
    1603.05100 [pdf]
    0 citations
  5. 05

    [Submitted on 16 Mar 2016]

    New parametrization of the deuteron wave function and calculations of the tensor polarization

    V. I. Zhaba

    The coefficients of new analytical forms for the deuteron wave function in coordinate space for NijmI, NijmII, Nijm93, Reid93 and Argonne v18 potentials have been numerically calculated. The obtained wave functions do not contain any superfluous knots. The designed parameters of the deuteron are in good agreement with the experimental and theoretical data. The new parameterization of the deuteron wave function in momentum space is obtained. The tensor polarization t20 calculated based on the wave functions is proportionate to the earlier published results.

    Comments:
    13 pages, 4 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1603.05174 [pdf]
    4 citations
  6. 06

    [Submitted on 12 Mar 2016] (cross-list from astro-ph.CO)

    The Cosmological Lithium Problem Revisited

    C.A. Bertulani · A.M. Mukhamedzhanov · Shubhchintak

    After a brief review of the cosmological lithium problem, we report a few recent attempts to find theoretical solutions by our group at Texas A&M University (Commerce & College Station). We will discuss our studies on the theoretical description of electron screening, the possible existence of parallel universes of dark matter, and the use of non-extensive statistics during the Big Bang nucleosynthesis epoch. Last but not least, we discuss possible solutions within nuclear physics realm. The impact of recent measurements of relevant nuclear reaction cross sections for the Big Bang nucleosynthesis based on indirect methods is also assessed. Although our attempts may not able to explain the observed discrepancies between theory and observations, they suggest theoretical developments that can be useful also for stellar nucleosynthesis.

    Comments:
    10 pages, 4 figures. Plenary talk at the XI Latin American Symposium on Nuclear Physics and Applications, Medellin, Colombia, 30 November - 4 December 2015. AIP conference proceedings, to be published
    Subjects:
    Cosmology and Nongalactic Astrophysics (astro-ph.CO); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1603.03864 [pdf]
    AIP Conf.Proc.(2016)·3 citations
  7. 07

    [Submitted on 16 Mar 2016] (cross-list from hep-ph)

    Universal relations between nongaussian fluctuations in heavy-ion collisions

    Jiunn-Wei Chen🇺🇸 · Jian Deng🇨🇳 · Hiroaki Kohyama🇹🇼 · Lance Labun🇺🇸

    We show that universality near a critical end point implies a characteristic relation between third- and fourth-order baryon susceptibilities and , resulting in a banana-shaped loop when is plotted as a function of along a freeze-out line. Including the individual enhancements of and near a critical point, these features may be a consistent set of observations supporting the interpretation of baryon fluctuations data as arising from criticality.

    Comments:
    5 pages, 6 figures, revtex style; v2 as published
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1603.05198 [pdf]
    PRD(2017)·16 citations

Affiliations

first authorsco-authorsvia INSPIRE