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Nuclear Theory·nucl-th

Wednesday·November 9, 2016

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 03

    [Submitted on 8 Nov 2016] (cross-list from hep-ph)

    Spin polarization and color superconductivity in the Nambu--Jona-Lasinio model at finite temperature

    Hiroaki Matsuoka (Kochi Univ., Japan)🇯🇵 · Yasuhiko Tsue (Kochi Univ., Japan)🇯🇵 · Joao da Providencia (Univ. de Coimbra, Portugal)🇵🇹 · Constancia Providencia (Univ. de Coimbra, Portugal)🇵🇹 · Masatoshi Yamamura (Kansai Univ., Japan)🇯🇵

    We investigate the possible existence of spin polarization and color superconductivity in the Nambu--Jona-Lasinio model with a tensor-type interaction at finite density and temperature. The thermodynamic potential is calculated by the functional integral method. Numerical results indicate that at low temperature and quark chemical potential the chiral condensed phase exists, and at intermediate chemical potential the color superconducting phase appears. In addition, depending on the magnitude of the tensor coupling, at large chemical potential and low temperature, a color superconducting phase and a spin polarized phase may coexist while at intermediate temperatures only the spin polarized phase occurs.

    Comments:
    10 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1611.02394 [pdf]
    PRD(2017)·11 citations
  2. 04

    [Submitted on 8 Nov 2016] (cross-list from hep-ph)

    Confinement, Holonomy and Correlated Instanton-Dyon Ensemble I: SU(2) Yang-Mills Theory

    Miguel Angel Lopez-Ruiz🇺🇸 · Yin Jiang🇺🇸 · Jinfeng Liao🇺🇸

    The mechanism of confinement in Yang-Mills theories remains a challenge to our understanding of nonperturbative gauge dynamics. While it is widely perceived that confinement may arise from chromo-magnetically charged gauge configurations with nontrivial topology, it is not clear what types of configurations could do that and how, in pure Yang-Mills and QCD-like (non-supersymmetric) theories. Recently a promising approach has emerged, based on statistical ensembles of dyons/anti-dyons that are constituents of instanton/anti-instanton solutions with nontrivial holonomy where the holonomy plays a vital role as an effective "Higgsing" mechanism. We report a thorough numerical investigation of the confinement dynamics in SU(2) Yang-Mills theory by constructing such a statistical ensemble of correlated instanton-dyons.

    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1611.02539 [pdf]
    PRD(2018)·15 citations

Affiliations

first authorsco-authorsvia INSPIRE