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arXiv 0705.1196hep-phnucl-th
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扩展NJL模型中多夸克相互作用对色超导相变的影响

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

Kouji Kashiwa, Masayuki Matsuzaki, Hiroaki Kouno, Masanobu Yahiro

摘要:

本文研究了具有非线性手征双夸克耦合的Nambu-Jona-Lasinio模型中手征相变和色超导相变的相互作用.我们观察到,这种非线性耦合与ω^2相互作用相干叠加,产生手征色超导共存相,或者根据其符号相互抵消。讨论了相图中大的共存区与核子的夸克-双夸克图象是一致的,而它的小是Ginzburg-Landau方法适用的前提。

英文摘要:

We study the interplay of the chiral and the color superconducting phase transitions 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 ω^2 interaction to produce the chiral-color superconductivity coexistence phase or cancel each other depending on its sign. We discuss that 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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