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Nuclear Theory·nucl-th

Monday·March 12, 2018

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 01

    [Submitted on 8 Mar 2018]

    Off-equilibrium corrections to energy and conserved charge densities in the relativistic fluid in heavy-ion collisions

    Akihiko Monnai🇫🇷

    Dissipative processes in relativistic fluids are known to be important in the analyses of the hot QCD matter created in high-energy heavy-ion collisions. In this work, I consider dissipative corrections to energy and conserved charge densities, which are conventionally assumed to be vanishing but could be finite. Causal dissipative hydrodynamics is formulated in the presence of those dissipative currents. The relation between hydrodynamic stability and transport coefficients is discussed. I then study their phenomenological consequences on the observables of heavy-ion collisions in numerical simulations. It is shown that particle spectra and elliptic flow can be visibly modified.

    Comments:
    10 pages, 5 figures; title changed, references added, conclusions unchanged
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1803.03318 [pdf]
    PRC(2018)·11 citations
  2. 02

    [Submitted on 9 Mar 2018]

    Probing the density dependence of the symmetry energy by nucleon flow

    Xiao-Hua Fan · Gao-Chan Yong · Wei Zuo

    In the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck transport model, sensitive regions of some nucleon observables to the nuclear symmetry energy are studied. It is found that the symmetry energy sensitive observable n/p ratio in the Sn+Sn reaction at 0.3 GeV/nucleon in fact just probes the density-dependent symmetry energy below the density of and effectively probes the density-dependent symmetry energy around or somewhat below the saturation density. Nucleon elliptic flow can probe the symmetry energy from the low-density region to the high-density region when changing the incident beam energies from 0.3 to 0.6 GeV/nucleon in the semi-central Sn+Sn reaction. And nucleon transverse and elliptic flows in the semi-central Au+Au reaction at 0.6 GeV/nucleon are more sensitive to the high-density behavior of the nuclear symmetry energy. One thus concludes that nucleon observables in the heavy reaction system and with higher incident beam energy are more suitable to be used to probe the high-density behavior of the symmetry energy. The present study may help one to get more specific information about the density-dependent symmetry energy from nucleon flow observable in heavy-ion collisions at intermediate energies.

    Comments:
    5 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1803.03338 [pdf]
    PRC(2018)·12 citations

Affiliations

first authorsco-authorsvia INSPIRE