Meson loop effect on high density chiral phase transition

Tomohiko Sakaguchi, Kouji Kashiwa, Masayuki Matsuzaki, Hiroaki Kouno, Masanobu Yahiro

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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/Nc, which correspond to the next-to-leading order in the 1/Nc 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 Nc = 3, however, instability of the mean field effective potential prevents us from determining the minimum of the corrected one.

Original languageEnglish
Pages (from-to)116-121
Number of pages6
JournalCentral European Journal of Physics
Issue number1
Publication statusPublished - Mar 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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