Confinement and ℤ3 symmetry in three-flavor QCD

Hiroaki Kouno, Takahiro Makiyama, Takahiro Sasaki, Yuji Sakai, Masanobu Yahiro

研究成果: ジャーナルへの寄稿記事

27 引用 (Scopus)

抄録

We investigate the relation between the confinement and the Z3 symmetry in three-flavor QCD with imaginary isospin chemical potentials (μu,μd,μs) = (iT,iT, 0), using the Polyakov-loop extended NambuJonaLasinio (PNJL) model, where T is temperature. As for three-degenerate flavors, the system has ℤ3 symmetry at = 2π/3 and hence the Polyakov loop ψ vanishes there for small T. As for 2+1 flavors, the symmetry is not preserved for any , but ψ becomes zero at = conf < 2π/3 for small T. The confinement phase defined by ψ = 0 is realized, even if the system does not have Z3 symmetry exactly. In the T plane, there is a critical endpoint of deconfinement transition. The deconfinement crossover at zero chemical potential is a remnant of the first-order deconfinement transition at = conf. The relation between the nondiagonal element Xus of quark-number susceptibilities and the deconfinement transition is studied. The present results can be checked by lattice QCD simulations directly, since the simulations are free from the sign problem for any .

元の言語英語
記事番号095003
ジャーナルJournal of Physics G: Nuclear and Particle Physics
40
発行部数9
DOI
出版物ステータス出版済み - 9 1 2013

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quantum chromodynamics
symmetry
crossovers
simulation
quarks
magnetic permeability
temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

これを引用

Confinement and ℤ3 symmetry in three-flavor QCD. / Kouno, Hiroaki; Makiyama, Takahiro; Sasaki, Takahiro; Sakai, Yuji; Yahiro, Masanobu.

:: Journal of Physics G: Nuclear and Particle Physics, 巻 40, 番号 9, 095003, 01.09.2013.

研究成果: ジャーナルへの寄稿記事

Kouno, Hiroaki ; Makiyama, Takahiro ; Sasaki, Takahiro ; Sakai, Yuji ; Yahiro, Masanobu. / Confinement and ℤ3 symmetry in three-flavor QCD. :: Journal of Physics G: Nuclear and Particle Physics. 2013 ; 巻 40, 番号 9.
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