Vector-type four-quark interaction and its impact on QCD phase structure

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dc.creatorSakai, Yuji
dc.creatorKashiwa, Kouji
dc.creatorKouno, Hiroaki
dc.creatorMatsuzaki, Masayuki
dc.creatorYahiro, Masanobu
dc.date2008-06-30
dc.date.accessioned2026-07-07T11:52:08Z
dc.date.available2026-07-07T11:52:08Z
dc.descriptionEffects of the vector-type four-quark interaction on QCD phase structure are investigated in the imaginary chemical potential region, by using the Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model with the extended Z3 symmetry. In the course to this end, we clarify analytically the Roberge-Weiss periodicity and symmetry properties of various quantities under the existence of a vector-type four-quark interaction. In the imaginary chemical potential region, the chiral condensate and the quark number density are sensitive to the strength of the interaction. Based on this result, we propose a possibility to determine the strength of the vector-type interaction, which largely affects QCD phase structure in the real chemical potential region, by comparing the results of lattice simulations and effective model calculations in the imaginary chemical potential region.
dc.description8 pages, 11 figures
dc.identifierhttps://arxiv.org/abs/0806.4799
dc.identifierhttp://arxiv.org/abs/0806.4799
dc.identifierPhys.Rev.D78:076007,2008
dc.identifierdoi:10.1103/PhysRevD.78.076007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204125
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Theory
dc.subjectNuclear Theory
dc.titleVector-type four-quark interaction and its impact on QCD phase structure
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