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Nuclear Theory·nucl-th

Thursday·August 13, 2020

9 papers—2 primary·7 cross-listed

All9Primary2Cross-lists7
  1. 01

    [Submitted on 12 Aug 2020]

    A Guided Tour of Ab Initio Nuclear Many-Body Theory

    H. Hergert🇺🇸

    Over the last decade, new developments in Similarity Renormalization Group techniques and nuclear many-body methods have dramatically increased the capabilities of ab initio nuclear structure and reaction theory. Ground and excited-state properties can be computed up to the tin region, and from the proton to the presumptive neutron drip lines, providing unprecedented opportunities to confront two- plus three-nucleon interactions from chiral Effective Field Theory with experimental data. In this contribution, I will give a broad survey of the current status of nuclear many-body approaches, and I will use selected results to discuss both achievements and open issues that need to be addressed in the coming decade.

    Comments:
    39 pages + references (58 pages total), 15 figures, to be published in Frontiers in Physics as a contribution to the Research Topic "The Future of Nuclear Structure: Challenges and Opportunities in the Microscopic Description of Nuclei"
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2008.05061 [pdf]
    Front.in Phys.(2020)·301 citations
  2. 02

    [Submitted on 12 Aug 2020]

    Thermal and viscous dissipation in relativistic heavy ion collisions

    Sukanya Mitra🇮🇳 · Subrata Pal🇮🇳

    We investigate the effects of finite baryon density and temperature on the bulk properties of matter formed in relativistic heavy ion collisions within second-order dissipative hydrodynamics. The relativistic fluid evolution equations for heat flow and shear stress tensor are derived from kinetic theory by using Grad's 14-moment approximation for the single-particle phase-space distribution function. The new equations provide a number of additional terms associated with heat-shear couplings as compared to the existing derivations based on entropy principle. The dissipative equations are encoded in non-boost-invariant hydrodynamic model simulation and studied for the evolution of high baryon density matter encountered at the beam energy scan program at RHIC. We find that thermal dissipation dominates shear pressure in defining the bulk observables at the low energy but its effect diminishes at ultra-relativistic energies.

    Comments:
    7 pages, 4 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2008.05207 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE