Influence of scalar-isovector delta-meson field on quark phase structure in neutron stars

TL;DR

This paper investigates how including the scalar-isovector delta-meson field affects the phase transition from hadronic to quark matter and the resulting structure of hybrid neutron stars.

Contribution

It introduces the delta-meson field into the RMF model for hadronic matter and analyzes its impact on the deconfinement phase transition and star structure.

Findings

Delta-meson field alters phase transition parameters.

Presence of delta-meson affects hybrid star mass and radius.

Structural properties of neutron stars are modified by the delta-meson inclusion.

Abstract

The deconfinement phase transition from hadronic matter to quark matter in the interior of compact stars is investigated. The hadronic phase is described in the framework of relativistic mean-field (RMF) theory, when also the scalar-isovector delta-meson effective field is taken into account. The MIT bag model for describing a quark phase is used. The changes of the parameters of phase transition caused by the presence of delta-meson field are explored. Finally, alterations in the integral and structural parameters of hybrid stars due to both deconfinement phase transition and inclusion of delta-meson field are discussed.