Meson mass at real and imaginary chemical potentials

Kouji Kashiwa, Masayuki Matsuzaki, Hiroaki Kouno, Yuji Sakai, Masanobu Yahiro

研究成果: ジャーナルへの寄稿記事

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Chemical-potential dependence of pi and sigma meson masses is analyzed at both real and imaginary chemical potentials, μR and μI, by using the Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model that possesses both the extended Z3 symmetry and chiral symmetry. In the μI region, the meson masses have the Roberge-Weiss periodicity. The μI dependence of the meson masses becomes stronger as temperature increases. We argue that meson masses and physical quantities in the μR region will be determined from lattice QCD data on meson masses in the μI region by using the PNJL model, if the data are measured in the future.

元の言語英語
記事番号076008
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
79
発行部数7
DOI
出版物ステータス出版済み - 4 1 2009

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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