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Discussions on the crossover property within the Nambu--Jona-Lasinio model

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arxiv 1312.1796 v1 pith:4ZWQQAC2 submitted 2013-12-06 hep-ph

Yi-lun Du , Zhu-fang Cui , Yong-hui Xia , Hong-shi Zong This is my paper · ORCID
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keywords criticalcrossovermodelnambu--jona-lasinioregiontemperatureapproximationband
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In this paper, chiral symmetry breaking and its restoration are investigated in the mean field approximation of Nambu--Jona-Lasinio model. A first-order phase transition exists at low temperature, but is smeared out at high temperature. We discuss the rationality of using susceptibilities as the criteria to determine the crossover region as well as the critical point. Based on our results, it is found that to define a critical band instead of an exclusive line in this region might be a more suitable choice.

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    In a Fierz-complete NJL model with neutrality constraints, scalar-isovector, vector-isovector, and vector-isovector-color-octet channels significantly shape the two-flavor color-superconducting phase diagram, and an i...

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