Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-01-09
AIPConf.Proc.892:518-520,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
Talk at " Quark Confinement and the Hadron Spectrum VII", Ponta Delgada, September 2-7, 2006
Scientific paper
10.1063/1.2714459
The Equation of States (EoS) plays the crucial role in all studies of neutron star properties. Still, a microscopical understanding of EoS remains largely an unresolved problem. We use 2-color QCD as a model to study the dependence of vacuum energy (gluon condensate in QCD) as function of chemical potential \mu\ll \Lambda_{QCD} where we find very strong and unexpected dependence on $\mu$. We present the arguments suggesting that similar behavior may occur in 3-color QCD in the color superconducting phases. Such a study may be of importance for analysis of EoS when phenomenologically relevant parameters (within such models as MIT Bag model or NJL model) are fixed at zero density while the region of study lies at much higher densities not available for terrestrial tests.
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