Exploring the parameter space of quasi-particle model with the strange quark stars

2020/10/15 by Cai, Wen-Hua, Wang, Qing-Wu
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2010.07448

Abstract

The properties of strange quark stars are studied within the quasi-particle model. Taking into account the chemical equilibrium and charge neutrality, the EOS of (2+1) -flavor quark matter is obtained. We illustrate the parameter spaces with constraints from two aspects: the one is based on the astronomical results of PSR J 0740+6620 and GW 170817 , and another is based on the constraints proposed from the theoretical study of compact star that the EOS must ensure the tidal deformability \varLambda_1.4=190⁺³⁹⁰_-120 and support a maximum mass above 1.97~M_\odot . It is found that the both types of constraints can not restrict the parameter space of quasi-particle model in a reliable region and thus we conclude that the small compact star cannot be strange quark star.

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