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"Deconfinement transition at neutron star cores"
G. Lugones and A.G. Grunfeld
Proc. of the "XXXIV edition of the Brazilian Workshop on Nuclear Physics", Foz do Iguaçu, Parana, Brazil, June 5-10, 2011.
Proceedings of Science PoS(XXXIV BWNP)040 (2011)
The core of compact stars can reach densities that are several times larger than the saturation density of nuclear matter. In such extreme conditions the baryons get so compressed that they can produce a deconfined gas of quark matter. In this work we present new results on the deconfinement transition in old neutron stars and in protoneutron stars. We impose color and flavor conservation during the transition in such a way that just deconfined quark matter is transitorily out of equilibrium with respect to weak interactions. The hadronic phase is described through a relativistic mean field model including the baryon octet while quark matter is described through the Nambu-Jona-Lasinio model and the MIT Bag model. We study the effect of color superconductivity and neutrino trapping on the critical density for deconfinement. We explore some astrophysical consequences of the results, in particular, the possible generation of short gamma ray bursts.
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