## 抄録

We investigate the relation between the confinement and the Z_{3} 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 ℤ_{3} 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 X_{us} 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 .

本文言語 | 英語 |
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論文番号 | 095003 |

ジャーナル | Journal of Physics G: Nuclear and Particle Physics |

巻 | 40 |

号 | 9 |

DOI | |

出版ステータス | 出版済み - 9月 2013 |

## !!!All Science Journal Classification (ASJC) codes

- 核物理学および高エネルギー物理学

## フィンガープリント

「Confinement and ℤ_{3}symmetry in three-flavor QCD」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。