Diquark and Chiral Condensates in a Self-Consistent NJL-type Model
PHYSICAL REVIEW D(2023)
摘要
In this work, a modified two-flavor Nambu-Jona-Lasinio-type model is utilized, in which the contact current-current interaction is Fierz-transformed into quark-antiquark interactions and quark-quark interactions, which are directly related to the chiral condensate and diquark condensate, respectively. Under mean-field approximation, the chiral condensate and the diquark condensate are studied on the same footing. We discuss in detail the competition between the chiral condensate and the diquark condensate, which are exclusively paired with u and d quarks, while also investigating the order of the chiral phase transition through an analysis of the resulting chiral susceptibility.
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