Effects of a multi-quark interaction on color superconducting phase transition in an extended NJL model

Kouji Kashiwa, Masayuki Matsuzaki, Hiroaki Kouno, Masanobu Yahiro

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We study the interplay of the chiral and the color superconducting phase transition in an extended Nambu-Jona-Lasinio model with a multi-quark interaction that produces the nonlinear chiral-diquark coupling. We observe that this nonlinear coupling adds up coherently with the ω2 interaction to either produce the chiral-color superconductivity coexistence phase or cancel each other depending on its sign. We discuss that a large coexistence region in the phase diagram is consistent with the quark-diquark picture for the nucleon whereas its smallness is the prerequisite for the applicability of the Ginzburg-Landau approach.

Original languageEnglish
Pages (from-to)143-147
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume657
Issue number1-3
DOIs
Publication statusPublished - Nov 29 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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