Thermodynamics and critical behavior in the Nambu-Jona-Lasinio model of QCD

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dc.creatorCosta, Pedro
dc.creatorRuivo, M. C.
dc.creatorde Sousa, C. A.
dc.date2008-01-22
dc.date2008-06-17
dc.date.accessioned2026-07-07T11:55:25Z
dc.date.available2026-07-07T11:55:25Z
dc.descriptionWe investigate the phase diagram of strongly interacting matter as a function of temperature and baryonic density/chemical potential, within Nambu--Jona-Lasinio type models. We perform a systematic study concerning the existence, location, and properties of a critical end point/tricritical point, both in SU(2) and SU(3) versions of the model. We verify that, for $m_u=m_d=0$ and up to a critical strange quark mass, there is a tricritical point, which becomes a critical end point in a world with realistic values of the current quark masses. The properties of physical observables, such as the baryon number susceptibility and the specific heat, are analyzed in the vicinity of the critical end point, with special focus on their critical exponents. The behavior of mesons in the $T-μ_B(ρ_B)$ plane is analyzed in connection with possible signatures of partial and effective restoration of chiral symmetry.
dc.description29 pages, 8 figures; PRD version
dc.identifierhttps://arxiv.org/abs/0801.3417
dc.identifierhttp://arxiv.org/abs/0801.3417
dc.identifierPhys.Rev.D77:096001,2008
dc.identifierdoi:10.1103/PhysRevD.77.096001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205239
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThermodynamics and critical behavior in the Nambu-Jona-Lasinio model of QCD
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