Small quark stars in the chromodielectric model

Details Small quark stars in the chromodielectric model Small quark stars in the chromodielectric model

2001-11-12

arxiv.org/abs/hep-ph/0111148v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, AIP macros; Talk delivered at the Pan American Advanced Studies Institute (PASI) Conference "New States of Matter in

Scientific paper

10.1063/1.1513708

Equations of state for strange quark matter in beta equilibrium at high densities are used to investigate the structure (mass and radius) of compact objects. The chromodielectric model is used as a general framework for the quark interactions, which are mediated by chiral mesons, $\sigma$ and $\vec \pi$, and by a confining chiral singlet dynamical field, $\chi$. Using a quartic potential for $\chi$, two equations of state for the same set of model parameters are obtained, one with a minimum at around the nuclear matter density $\rho_0$ and the other at $\rho \sim 5 \rho_0$. Using the latter equation of state in the Tolman-Oppenheimer-Volkoff equations we found solutions corresponding to compact objects with $R\sim 5 - 8$ km and $M\sim M_\odot$. The phenomenology of recently discovered X-ray sources is compatible with the type of quark stars that we have obtained.

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