How parameters and regularization affect the Polyakov–Nambu–Jona-Lasinio model phase diagram and thermodynamic quantities
نویسندگان
چکیده
منابع مشابه
Polyakov–Nambu–Jona-Lasinio Models and QCD Phase Diagram
Strongly interacting matter under extreme conditions is a topic of continuing interest, both from the point of view of ultrarelativistic heavy-ion collisions and lattice QCD. In our work we use approaches based on the timehonored Nambu–Jona-Lasinio model in order to investigate the nature of the different phases of QCD matter at finite temperatures and densities. From hadron spectroscopy it is ...
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The study of strong interactions by means of effective models, which are simpler to manage than Quantum Chromodynamics (QCD), is nowadays very popular. Among the various effective models of QCD the Nambu-Jona Lasinio model (NJL) is widely used since it allows for a simple and non perturbative discussion of chiral symmetry breaking and related phenomena.1), 2) The NJL model can be improved by th...
متن کاملPhase diagram and critical properties in the Polyakov–Nambu–Jona-Lasinio model
We investigate the phase diagram of the so-called Polyakov–Nambu–Jona-Lasinio model at finite temperature and nonzero chemical potential with three quark flavours. Chiral and deconfinement phase transitions are discussed, and the relevant order-like parameters are analyzed. The results are compared with simple thermodynamic expectations and lattice data. A special attention is payed to the crit...
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We reexamine the recent instanton motivated studies of Alford, Rajagopal and Wilczek, and Berges and Rajagopal in the framework of the standard SU(2) Nambu-Jona-Lasinio model. The chiral phase diagram is calculated in the temperature–density plane, and the pressure is evaluated as the function of the density. Obtaining simple approximate relations describing the T-µ and T-p F phase transition l...
متن کاملRegularization in the gauged Nambu-Jona-Lasinio model.
Various prescriptions employed for regulating gauged Nambu–Jona-Lasinio type models such as the top-quark condensate model are discussed. The use of dimensional regularization maintains gauge invariance but destroys the quadratic divergence in the gap equation. If instead a simple ultraviolet momentum cutoff is used to regulate loop integrals, then gauge invariance is destroyed by a quadratical...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2010
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.81.016007