Average phase factor in the Polyakov-loop extended Nambu-Jona-Lasinio model

Yuji Sakai, Takahiro Sasaki, Hiroaki Kouno, Masanobu Yahiro

研究成果: Contribution to journalArticle査読

20 被引用数 (Scopus)

抄録

The average phase factor e2iθ of the QCD determinant is evaluated at the finite quark chemical potential (μq) with the two-flavor version of the Polyakov-loop extended Nambu-Jona-Lasinio model with the scalar-type eight-quark interaction. For μq larger than half the pion mass mπ at vacuum, e2iθ is finite only when the Polyakov loop is larger than ∼0.5, indicating that lattice QCD is feasible only in the deconfinement phase. A critical end point lies in the region of e2iθ=0. The scalar-type eight-quark interaction makes it shorter a relative distance of the critical end point to the boundary of the region. For μq<mπ/2, the Polyakov-loop extended Nambu-Jona-Lasinio model with dynamical mesonic fluctuations can reproduce lattice QCD data below the critical temperature.

本文言語英語
論文番号096007
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
82
9
DOI
出版ステータス出版済み - 11 10 2010

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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