TY - JOUR
T1 - Effects of a multi-quark interaction on color superconducting phase transition in an extended NJL model
AU - Kashiwa, Kouji
AU - Matsuzaki, Masayuki
AU - Kouno, Hiroaki
AU - Yahiro, Masanobu
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2007/11/29
Y1 - 2007/11/29
N2 - 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.
AB - 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.
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U2 - 10.1016/j.physletb.2007.08.071
DO - 10.1016/j.physletb.2007.08.071
M3 - Article
AN - SCOPUS:36048962135
VL - 657
SP - 143
EP - 147
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-3
ER -