1,975 research outputs found
Quark mass effects in the thermodynamical properties of an extended (P)NJL model
We analyze the thermodynamical properties of a system of strongly interacting
particles at vanishing quark chemical potential in the framework of a recently
developed extension of the Polyakov-Nambu-Jona-Lasinio Model. In addition to
eight quark interactions terms, non-canonical terms which explicitly break
chiral symmetry up to the same order in a expansion ( number of
colors) are included. A recently proposed Polyakov potential is considered and
the results are compared to lattice QCD data resulting in a favorable scenario
for the recent model variants.Comment: To appear in the proceedings of "8th International Conference on
Quarks and Nuclear Physics (QNP2018)
The phase diagram in the SU(3) Nambu-Jona-Lasinio model with 't Hooft and eight-quark interactions
It is shown that the endpoint of the first order transition line which merges
into a crossover regime in the phase diagram of the Nambu--Jona-Lasinio model,
extended to include the six-quark 't Hooft and eight-quark interaction
Lagrangians, is pushed towards vanishing chemical potential and higher
temperatures with increasing strength of the OZI-violating eight-quark
interactions. We clarify a connection between the location of the endpoint in
the phase diagram and the mechanism of chiral symmetry breaking at the quark
level. Constraints on the coupling strengths based on groundstate stability and
physical considerations are explained.Comment: 5 pages, 3 figures, prepared for the proceedings of Hadron 2009 -
XIII International Conference on Hadron Spectroscopy, November 29 - December
4, Florida State University (USA
Extended Nambu--Jona-Lasinio model with eight quark interactions
We review the effect on vacuum properties and magnetic catalysis, of adding
the most general 0-spin 8-quark (8q) interactions to the combined SU(3) flavor
Nambu--Jona-Lasinio (NJL) and 6-quark (6q) 't Hooft interaction Lagrangian.Comment: Prepared for the International Symposium on Multiparticle Dynamics
2011 (ISMD2011
The Polyakov-Nambu-Jona-Lasinio model with six and eight quark interactions
The extension of the Nambu-Jona-Lasino Model with six and eight quark
interactions to include the Polyakov loop is analysed. Several interesting
features are determined to be an effect of the choice of the regularization
procedure. The use of a Pauli-Villars covariant regularization enables a
coherent and correct description of several quantities.Comment: 3 pages, 6 figures, to appear in the conference proceedings for Quark
Confinement and the Hadron Spectrum IX, August 30- September 3 2010, Madrid
(Spain
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