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Nuclear Theory·nucl-th

Thursday·May 1, 2025

11 papers—4 primary·7 cross-listed

All11Primary4Cross-lists7
  1. 01

    [Submitted on 30 Apr 2025]

    Impact of isospin asymmetric nuclear medium on pseudoscalar and vector mesons

    Tanisha🇮🇳 · Satyajit Puhan🇮🇳 · Navpreet Kaur🇮🇳 · Arvind Kumar🇮🇳 · Harleen Dahiya🇮🇳

    In this study, using the light-front quark model, we examine how an isospin asymmetric nuclear medium affects the properties of pseudoscalar () and vector () mesons under different temperature values and degrees of isospin asymmetry. To simulate the in-medium modifications of the constituent quark masses, we employ the chiral SU(3) quark mean field model. Our analysis focuses on evaluating the effective masses, weak decay constants, and distribution amplitudes (DAs) of mesons in isospin-asymmetric nuclear matter. The calculated vacuum values of the meson masses and decay constants show good agreement with existing experimental data, validating our approach to study the medium effects within the same framework.

    Comments:
    29 pages and 5 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2504.21392 [pdf]
    NPA(2026)·2 citations
  2. 02

    [Submitted on 30 Apr 2025]

    Double nuclear modification factor in relativistic heavy ion collisions

    A.S. Chernyshov🇷🇺 · I.P. Lokhtin🇷🇺 · A.M.Snigirev🇷🇺

    The hypothesis of the factorization of the double nuclear modification factor in relativistic heavy ion collisions is tested for different types of final-state hadrons within the HYDJET++ model. The results demonstrate that this factorization holds reasonably well at moderately high transverse momenta, provided that the effects of double parton scattering can be small or neglected.

    Comments:
    LaTeX, 9 pages, 1 figure
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2504.21515 [pdf]
    JETP Lett.(2025)·0 citations
  3. 03

    [Submitted on 30 Apr 2025]

    Dilepton emission in heavy ion collisions and chemical equilibrium of QCD matter

    Xiang-Yu Wu🇨🇦 · Lipei Du🇨🇦 · Charles Gale🇨🇦 · Sangyong Jeon🇨🇦

    We study thermal dilepton production and anisotropic flow in Pb+Pb collisions at using next-to-leading-order (NLO) thermal QCD dilepton emission rates. A hybrid model (IP-Glasma+\kompost+MUSIC+UrQMD) simulates the collision evolution. The role of the pre-equilibrium stage in dilepton observables is examined. We also explore how chemical equilibrium in QCD matter affect dilepton observables.

    Comments:
    6 pages, 3 figures. Contribution to the proceedings of Hard Probes 2024 (Nagasaki, Japan, 22-27 Sep. 2024)
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2504.21698 [pdf]
    EPJ Web Conf.(2025)·0 citations
  4. 04

    [Submitted on 30 Apr 2025]

    New {\em ab initio} constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: I. Subsaturation density domain

    Adriana R. Raduta · Mikhail V. Beznogov

    In numerical simulations of core-collapse supernova and binary neutron stars mergers, information about the energetics and composition of matter is implemented via external tables covering the huge ranges of thermodynamic conditions explored during the astrophysical evolution. More than 120 general-purpose equation of state (EOS) tables have been contributed so far. Unfortunately, not all of them comply with current constraints from theoretical and experimental nuclear physics and astrophysical observations of neutron stars. Systematic investigations of the role that dense matter properties play in the evolution of these astrophysical phenomena require that more EOS tables are provided. We build a set of general-purpose EOS tables. At zero temperature, they comply with all currently accepted constraints, including {\em ab initio} chiral effective field theory calculations of pure neutron matter. This set is designed to explore a wide variety of the behaviors of the effective masses as functions of density, which is reflected into a wide range of thermal behaviors. We employ Brussels extended Skyrme interactions generated by means of Bayesian inference techniques. An extended nuclear statistical equilibrium model is developed for modeling sub-saturated inhomogeneous nuclear matter (NM). Here, we study the properties of sub-saturated inhomogeneous NM over wide ranges of density, temperature, and proton fraction. We analyze in detail the mechanisms of transition to homogeneous matter and estimate the transition density. Our key results include a thick layer of neutron rich isotopes of He or H in the inner crusts of neo-neutron stars, significant abundance of exotic isotopes of H and He in warm and neutron-rich matter and a detailed study of the thermodynamic stability of cold stellar matter. The EOS tables are publicly available in the \textsc{CompOSE} online database.

    Comments:
    21 pages, 12 figures, 2 tables; submitted to A&A
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE)
    arXiv:
    2504.21725 [pdf]
    Astron.Astrophys.(2025)·6 citations

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first authorsco-authorsvia INSPIRE