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Nuclear Theory·nucl-th

Wednesday·April 19, 2023

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 04

    [Submitted on 18 Apr 2023] (cross-list from hep-ph)

    Multipole Expansion for the Electron-Nucleus Scattering at High Energies in the Unified Electroweak Theory

    Z.P. Luong🇻🇳 · M.T. Vo🇻🇳

    The paper presents the multipole expansion for the electron-nucleus scattering cross section at high energies within the framework of the unified electroweak theory. The electroweak currents of the nucleus are expanded into the simple components with definite angular momenta, called the multipole form factors. The multipole expansion of the cross section is a consequence of the above expansion. Besides the familiar electromagnetic form factors, there are also the vector and axial form factors, respectively, related to weak interactions. To determine multipole form factors, general formulas for the calculation of reduced matrix elements are established using the fractional parentage coefficient method and the multiparticle shell model. Calculation of them enables us to obtain more detailed information about the nuclear structure and elucidate the role played by the weak interaction in the high-energy reaction mechanisms.

    Comments:
    8 pages, 2 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2304.08700 [pdf]
    PLB(2023)·1 citation
  2. 05

    [Submitted on 18 Apr 2023] (cross-list from hep-ph)

    Probing vortical structures in heavy-ion collisions at RHIC-BES energies through helicity polarization

    Cong Yi🇨🇳 · Xiang-Yu Wu🇨🇳 · Di-Lun Yang🇹🇼 · Jian-Hua Gao🇨🇳 · Shi Pu🇨🇳 · Guang-You Qin🇨🇳

    We investigate the hydrodynamic helicity polarization of hyperons, defined as the projection of the spin polarization vector along the directions of particle momenta, at RHIC-BES energies by utilizing the relativistic (3+1)D CLVisc hydrodynamics framework with SMASH initial conditions. As opposed to local spin polarization at high energy collisions, our hydrodynamic simulations demonstrate that the helicity polarization induced by the kinetic vorticity dominates over other contributions at intermediate and low collision energies. Our findings provide an opportunity to probe the fine structure of local kinetic vorticity as a function of azimuthal angle at intermediate and low collision energies by mapping our predictions to the future measurements in experiments.

    Comments:
    8 pages, 3 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2304.08777 [pdf]
    PRC(2024)·16 citations
  3. 06

    [Submitted on 18 Apr 2023] (cross-list from hep-ph)

    Constraining the equation of state with heavy quarks in the quasi-particle model of QCD matter

    Feng-Lei Liu🇨🇳 · Xiang-Yu Wu🇨🇳 · Shanshan Cao🇨🇳 · Guang-You Qin🇨🇳 · Xin-Nian Wang🇨🇳

    In a quasi-particle model of QCD matter at finite temperature with thermal masses for quarks and gluons from hard thermal loops, the equation of state (EOS) can be described by an effective temperature dependence of the strong coupling . Assuming the same effective coupling between the exchanged gluon and thermal partons, the EOS can also be related to parton energy loss.} Based on the quasi-particle linear Boltzmann transport (QLBT) model coupled to a (3+1)-dimensional viscous hydrodynamic model of the quark-gluon plasma (QGP) evolution and a hybrid fragmentation-coalescence model for heavy quark hadronization, we perform a Bayesian analysis of the experimental data on meson suppression and anisotropy at RHIC and the LHC. We achieve a simultaneous constraint on the QGP EOS and the heavy quark transport coefficient, both consistent with the lattice QCD results.

    Comments:
    8 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2304.08787 [pdf]
    PLB(2024)·25 citations
  4. 07

    [Submitted on 18 Apr 2023] (cross-list from hep-th)

    Exact mapping from the -dimensional Skyrme model to the -dimensional sine-Gordon theory and some applications

    Fabrizio Canfora🇨🇱 · Marcela Lagos🇨🇱 · Pablo Pais🇨🇱 · Aldo Vera🇨🇱

    A remarkable exact mapping, valid for low-enough energy scales and close to a sharp boundary distribution of hadronic matter, from the -dimensional Skyrme model to the sine-Gordon theory in dimensions in the attractive regime is explicitly constructed. Besides the intrinsic theoretical interest to be able to describe the prototype of nonintegrable theories (namely, quantum chromodynamics in the infrared regime) in terms of the prototype of integrable relativistic field theories (namely, sine-Gordon theory in dimensions), we will show that this mapping can be extremely useful to analyze both equilibrium and out-of-equilibrium features of baryonic distributions in a cavity.

    Comments:
    16 pages, 5 figures incorporated. The title and abstract changed according to the referee's suggestions. The version matches the published version in the journal Physical Review D
    Subjects:
    High Energy Physics — Theory (hep-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2304.09137 [pdf]
    PRD(2023)·4 citations

Affiliations

first authorsco-authorsvia INSPIRE