The importance of the mixed phase in hybrid stars built with the Nambu-Jona-Lasinio model

M. G. Paoli; D. P. Menezes

doi:10.1140/epja/i2010-11059-0

EPJ

The importance of the mixed phase in hybrid stars built with the Nambu-Jona-Lasinio model

M. G. Paoli^* and D. P. Menezes

Departamento de Fısica, CFM, Universidade Federal de Santa Catarina, CP. 476, CEP 88.040-900, Florianópolis SC, Brazil

Received: 8 June 2010
Accepted: 26 October 2010
Published online: 14 November 2010

Abstract

We investigate the structure of hybrid stars based on two different constructions: one is based on the Gibbs condition for phase coexistence and considers the existence of a mixed phase (MP), and the other is based on the Maxwell construction and no mixed phase is obtained. The hadron phase is described by the non-linear Walecka model (NLW) and the quark phase by the Nambu-Jona-Lasinio model (NJL). We conclude that the masses and radii obtained are model dependent but not significantly different for both constructions.

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