3,384 research outputs found
Susceptibilities and the Phase Structure of a Chiral Model with Polyakov Loops
In an extension of the Nambu-Jona-Lasinio model where the quarks interact
with the temporal gluon field, represented by the Polyakov loop, we explore the
relation between the deconfinement and chiral phase transitions. The effect of
Polyakov loop dynamics on thermodynamic quantities, on the phase structure at
finite temperature and baryon density and on various susceptibilities is
presented. Particular emphasis is put on the behavior and properties of the
fluctuations of the (approximate) order parameters and their dependence on
temperature and net--quark number density. We also discuss how the phase
structure of the model is influenced by the coupling of the quarks to the
Polyakov loop.Comment: 18 pages, 22 figures; text rearranged and references added. results
and conclusions unchanged; final version accepted for publication in Phys.
Rev.
Effective chiral model with Polyakov loops and its application to hot/dense medium
We study the thermodynamics of the Nambu--Jona-Lasinio model with Polyakov
loops, where spontaneous chiral symmetry breaking and confinement are taken
into account. We focus on the phase structure of the model and explore the
susceptibilities associated with corresponding order parameters under the
mean-field approximation.Comment: 4 pages, 1 figure, to appear in the proceedings of the Yukawa
International Seminars (YKIS) 2006, Nov.27-Dec.1, 2006, Kyoto, Japa
Susceptibilities and the Phase Structure of an Effective Chiral Model with Polyakov Loops
In the Nambu--Jona-Lasinio model with Polyakov loops, we explore the relation
between the deconfinement and chiral phase transitions within the mean-field
approximation. We focus on the phase structure of the model and study the
susceptibilities associated with corresponding order parameters.Comment: 6 pages, 2 figures, contribution to the proceedings of the 19th
International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions
(QM2006), November 14-20 2006, Shanghai, Chin
Thermodynamic limit and semi--intensive quantities
The properties of statistical ensembles with abelian charges close to the
thermodynamic limit are discussed. The finite volume corrections to the
probability distributions and particle density moments are calculated. Results
are obtained for statistical ensembles with both exact and average charge
conservation. A new class of variables (semi--intensive variables) which differ
in the thermodynamic limit depending on how charge conservation is implemented
in the system is introduced. The thermodynamic limit behavior of these
variables is calculated through the next to leading order finite volume
corrections to the corresponding probability density distributions.Comment: 11 pages, 2 figures In v2 figures are added and corresponding
editorial changes are done. Paper will be published in Journal of Physics
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