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Nuclear Theory·nucl-th

Monday·October 5, 2020

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 04

    [Submitted on 25 Sept 2020] (cross-list from hep-th)

    Spin-Vorticity Coupling for Massive Vector Mesons

    Joseph I. Kapusta🇺🇸 · Ermal Rrapaj🇺🇸 · Serge Rudaz🇺🇸

    Recent experiments at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) have indicated that hadrons containing strange quarks produced in non-central heavy ion collisions can be polarized. We investigate in detail the coupling of spin and vorticity for electrically neutral, massive vector bosons using the Proca equation, and provide the nonrelativistic reduction of the field equations via a single Foldy--Wouthuysen transformation. We find that the resulting Hamiltonian is not-Hermitian, but invariant, and involves a spin dependent term to leading order in vorticity. We also calculate further relativistic and quantum corrections to the Hamiltonian.

    Subjects:
    High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2009.12010 [pdf]
    PRD(2020)·10 citations
  2. 05

    [Submitted on 2 Oct 2020] (cross-list from hep-ph)

    Equation of state of strongly magnetized matter with hyperons and -resonances

    Vivek Baruah Thapa🇮🇳 · Monika Sinha🇮🇳 · Jia-Jie Li🇨🇳 · Armen Sedrakian🇩🇪

    We construct a new equation of state for the baryonic matter under an intense magnetic field within the framework of covariant density functional theory. The composition of matter includes hyperons as well as -resonances. The extension of the nucleonic functional to the hypernuclear sector is constrained by the experimental data on and -hypernuclei. We find that the equation of state stiffens with the inclusion of the magnetic field, which increases the maximum mass of neutron star compared to the non-magnetic case. In addition, the strangeness fraction in the matter is enhanced. Several observables, like the Dirac effective mass, particle abundances, etc show typical oscillatory behavior as a function of the magnetic field and/or density which is traced back to the occupation pattern of Landau levels.

    Comments:
    16 pages, 8 figures, Accepted in journal "Particles", Corrected some typos. Matches with published version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    2010.00981 [pdf]
    Particles(2020)·37 citations

Affiliations

first authorsco-authorsvia INSPIRE