PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·March 3, 2017

8 papers—5 primary·3 cross-listed

All8Primary5Cross-lists3
  1. 01

    [Submitted on 1 Mar 2017]

    New estimation for neutron-neutron scattering length: charge symmetry and charge independence breaking revisited

    E.S. Konobeevski · S.V. Zuyev · V.I. Kukulin · V.N. Pomerantsev

    Recent experimental results for neutron-neutron scattering length are reanalyzed from the point of view of three-nucleon force contribution. We found that the limiting value of ~fm must be free of any implicit three-body force contribution. We have also shown that the difference between the above experimental value of and the well established value of neutron-proton scattering length can be explained by differences in the one-pion exchange potentials.

    Comments:
    4 pages, 4 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1703.00519 [pdf]
    3 citations
  2. 02

    [Submitted on 2 Mar 2017]

    Collective flow and hydrodynamics in large and small systems at the LHC

    Huichao Song🇨🇳 · You Zhou🇩🇰 · Katarina Gajdosova🇩🇰

    In this article, we briefly review the recent progress on collective flow and hydrodynamics in large and small systems at the Large Hadron Collider (LHC), which includes the following topics: extracting the QGP viscosity from the flow data, initial state fluctuations and final state correlations in 2.76 A TeV Pb--Pb collisions, correlations and collective flow in high energy p--Pb and p--p collisions.

    Comments:
    43 pages, 15 figures, Invited Review for Nuclear Science and Techniques
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1703.00670 [pdf]
    Nucl.Sci.Tech.(2017)·154 citations
  3. 03

    [Submitted on 2 Mar 2017]

    Isovector and isoscalar pairing in odd-odd nuclei within a quartet approach

    D. Negrea · N. Sandulescu · D. Gambacurta

    The quartet condensation model (QCM) is extended for the treatment of isovector and isoscalar pairing in odd-odd N=Z nuclei. In the extended QCM approach the lowest states of isospin T=1 and T=0 in odd-odd nuclei are described variationally by trial functions composed by a proton-neutron pair appended to a condensate of 4-body operators. The latter are taken as a linear superposition of an isovector quartet, built by two isovector pairs coupled to the total isospin T=0, and two collective isoscalar pairs. In all pairs the nucleons are distributed in time-reversed single-particle states of axial symmetry. The accuracy of the trial functions is tested for realistic pairing Hamiltonians and odd-odd N=Z nuclei with the valence nucleons moving above the cores O, Ca and Sn. It is shown that the extended QCM approach is able to predict with high accuracy the energies of the lowest T=0 and T=1 states. The present calculations indicate that in these states the isovector and the isoscalar pairing correlations coexist together, with the former playing a dominant role.

    Comments:
    14 pages, 2 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1703.00692 [pdf]
    PTEP(2017)·6 citations
  4. 04

    [Submitted on 2 Mar 2017]

    Heavy and light flavor jet quenching at RHIC and LHC energies

    Shanshan Cao🇺🇸 · Tan Luo🇨🇳 · Guang-You Qin🇨🇳 · Xin-Nian Wang🇨🇳

    The Linear Boltzmann Transport (LBT) model coupled to hydrodynamical background is extended to include transport of both light partons and heavy quarks through the quark-gluon plasma (QGP) in high-energy heavy-ion collisions. The LBT model includes both elastic and inelastic medium-interaction of both primary jet shower partons and thermal recoil partons within perturbative QCD (pQCD). It is shown to simultaneously describe the experimental data on heavy and light flavor hadron suppression in high-energy heavy-ion collisions for different centralities at RHIC and LHC energies. More detailed investigations within the LBT model illustrate the importance of both initial parton spectra and the shapes of fragmentation functions on the difference between the nuclear modifications of light and heavy flavor hadrons. The dependence of the jet quenching parameter on medium temperature and jet flavor is quantitatively extracted.

    Comments:
    6 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1703.00822 [pdf]
    PLB(2018)·173 citations
  5. 05

    [Submitted on 2 Mar 2017]

    Nuclear dipole polarizability from mean-field modeling constrained by chiral effective field theory

    Zhen Zhang · Yeunhwan Lim · Jeremy W. Holt · Che Ming Ko

    We construct a new Skyrme interaction Skm by fitting the equation of state and nucleon effective masses in asymmetric nuclear matter from chiral two- and three-body forces as well as the binding energies of finite nuclei. Employing this interaction to study the electric dipole polarizabilities of Ca, Ni, Sn, and Pb in the random-phase approximation, we find that the theoretical predictions are in good agreement with experimentally measured values without additional fine tuning of the Skyrme interaction, thus confirming the usefulness of the new Skyrme interaction in studying the properties of nuclei. We further use this interaction to study the neutron skin thicknesses of Ca and Pb, and they are found to be consistent with the experimental data.

    Comments:
    Significantly revised, 7 pages, 4 figures. Published version in PLB
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1703.00866 [pdf]
    PLB(2018)·35 citations

Affiliations

first authorsco-authorsvia INSPIRE