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Nuclear Theory·nucl-th

Thursday·April 29, 2021

7 papers—2 primary·5 cross-listed

All7Primary2Cross-lists5
  1. 01

    [Submitted on 28 Apr 2021]

    The interaction constrained by recent hypernuclei experiments

    Jinniu Hu🇨🇳 · Ying Zhang🇨🇳 · Hong Shen🇨🇳

    The interaction is investigated in the quark mean-field (QMF) model based on recent observables of the () system. The experimental data about the binding energy of -state hyperon in hypernuclei at KISO, IBUKI, E07-T011, E176-14-03-35 events are conflated as MeV. With this constraint, the coupling strengths between the vector meson and hyperon are fixed in three QMF parameter sets. Meanwhile, the binding energy of state in is predicted as MeV with the same interactions, which are completely consistent with the data from the KINKA and IRRAWADDY events. Finally, the single potential is calculated in the symmetric nuclear matter in the framework of QMF models. It is MeV at nuclear saturation density, which will contribute to the study on the strangeness degree of freedom in compact star.

    Comments:
    12pages, 4 figures, 2 tables
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2104.13567 [pdf]
    J.Phys.G(2022)·16 citations
  2. 02

    [Submitted on 28 Apr 2021]

    The sound speed and core of massive compact stars: A manifestation of hadron-quark duality

    Yong-Liang Ma🇨🇳 · Mannque Rho🇫🇷

    When baryon-quark continuity is formulated in terms of a topology change without invoking "explicit " QCD degrees of freedom at a density higher than twice the nuclear matter density the core of massive compact stars can be described in terms of fractionally charged particles, behaving neither like pure baryons nor deconfined quarks. Hidden symmetries, both local gauge and pseudo-conformal (or broken scale), lead to the pseudo-conformal (PC) sound velocity at in compact stars. We argue these symmetries are "emergent" from strong nuclear correlations and conjecture that they reflect hidden symmetries in QCD proper exposed by nuclear correlations. We establish a possible link between the quenching of in superallowed Gamow-Teller transitions in nuclei and the precocious onset at of the PC sound velocity predicted at the dilaton limit fixed point. We propose that bringing in explicit quark degrees of freedom as is done in terms of the "quarkyonic" and other hybrid hadron-quark structure and our topology-change strategy represent the "hadron-quark duality" formulated in terms of the Cheshire-Cat mechanism~\cite{CC} for the smooth cross-over between hadrons and quarks. Confrontation with currently available experimental observations is discussed to support this notion.

    Comments:
    12 pages, 6 figures. title changed, notion of "Cheshire-Catism" sharpened. arXiv admin note: text overlap with arXiv:2101.07121
    Subjects:
    Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2104.13822 [pdf]
    14 citations

Affiliations

first authorsco-authorsvia INSPIRE