Meson mass at real and imaginary chemical potentials

Journal Article · Wed Apr 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.076008· OSTI ID:21308224

Kashiwa, Kouji; Sakai, Yuji; Yahiro, Masanobu ^[1]; Matsuzaki, Masayuki ^[2]; Kouno, Hiroaki ^[3]

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1. Department of Physics, Graduate School of Sciences, Kyushu University, Fukuoka 812-8581 (Japan)
2. Department of Physics, Fukuoka University of Education, Munakata, Fukuoka 811-4192 (Japan)
3. Department of Physics, Saga University, Saga 840-8502 (Japan)

Chemical-potential dependence of pi and sigma meson masses is analyzed at both real and imaginary chemical potentials, {mu}{sub R} and {mu}{sub I}, by using the Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model that possesses both the extended Z{sub 3} symmetry and chiral symmetry. In the {mu}{sub I} region, the meson masses have the Roberge-Weiss periodicity. The {mu}{sub I} dependence of the meson masses becomes stronger as temperature increases. We argue that meson masses and physical quantities in the {mu}{sub R} region will be determined from lattice QCD data on meson masses in the {mu}{sub I} region by using the PNJL model, if the data are measured in the future.

• OSTI ID: 21308224
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 7; Other Information: DOI: 10.1103/PhysRevD.79.076008; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
MASS
MESONS
PERIODICITY
POTENTIALS
QUANTUM CHROMODYNAMICS
SIMULATION