Quark Number Fluctuations in a Chiral Model at Finite Baryon Chemical Potential

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dc.creatorSasaki, C.
dc.creatorFriman, B.
dc.creatorRedlich, K.
dc.date2006-11-10
dc.date2007-03-08
dc.date.accessioned2026-07-07T11:02:11Z
dc.date.available2026-07-07T11:02:11Z
dc.descriptionWe discuss the net quark and isovector fluctuations as well as off-diagonal quark flavor susceptibilities along the chiral phase transition line in the Nambu--Jona-Lasinio (NJL) model. The model is formulated at non-zero quark and isospin chemical potentials with non-vanishing vector couplings in the iso-scalar and iso-vector channels. We study the influence of the quark chemical potential on the quark flavour susceptibilities in detail and the dependence of the results on model parameters as well as on the quark mass. The NJL model findings are compared with recent lattice results obtained in two--flavor QCD at finite chemical potential. On a qualitative level, the NJL model provides a consistent description of the dependence of quark number fluctuations on temperature and baryon chemical potential. The phase diagram and the position of the tricritical point in the NJL model are also discussed for different parameter sets.
dc.description33 pages, 11 figures; final version accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0611143
dc.identifierhttp://arxiv.org/abs/hep-ph/0611143
dc.identifierPhys.Rev.D75:054026,2007
dc.identifierdoi:10.1103/PhysRevD.75.054026
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188172
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleQuark Number Fluctuations in a Chiral Model at Finite Baryon Chemical Potential
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