Meson loop effect on high density chiral phase transition

• Authors: Tomohiko Sakaguchi , Kouji Kashiwa , Masayuki Matsuzaki , Hiroaki Kouno , Masanobu Yahiro
• Languages of publication: EN

Abstracts

EN

We test the stability of the mean field solution in the Nambu-Jona-Lasinio model in a semi-quantitative manner. For stable solutions with respect to both the σ and π directions, we investigate effects of the mesonic loop corrections of 1/N
c, which correspond to the next-to-leading order in the 1/N
c expansion, on the high density chiral phase transition. The corrections weaken the first order phase transition and shift the critical chemical potential to a lower value. At N
c = 3, however, instability of the mean field effective potential prevents us from determining the minimum of the corrected one.

Keywords

EN

meson loop; high density; chiral phase transition

Discipline

• 11.30.Rd: Chiral symmetries
• 12.40.-y: Other models for strong interactions

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2008
• Volume: 6
• Issue: 1
• Pages: 116-121

Dates

published

1 - 3 - 2008

online

26 - 3 - 2008

Contributors

author

Tomohiko Sakaguchi

• Department of Physics, Graduate School of Sciences, Kyushu University, Fukuoka, 812-8581, Japan

author

Kouji Kashiwa

• Department of Physics, Graduate School of Sciences, Kyushu University, Fukuoka, 812-8581, Japan

author

Masayuki Matsuzaki

author

Hiroaki Kouno

• Department of Physics, Saga University, Saga, 840-8502, Japan

author

Masanobu Yahiro

• Department of Physics, Graduate School of Sciences, Kyushu University, Fukuoka, 812-8581, Japan

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Identifiers

DOI

10.2478/s11534-008-0006-4