Hybrid stars from a three-flavor NJL model with two kinds of tensor condensates

TL;DR

This paper models hybrid stars using a three-flavor NJL model with tensor condensates, revealing their impact on the stars' properties and providing insights into quark matter equations of state.

Contribution

It introduces tensor-type interactions into the NJL model to study their effects on hybrid star structure and quark matter properties.

Findings

Tensor condensates appear at high chemical potentials.

The presence of tensor condensates affects the mass-radius relationship of hybrid stars.

The model provides a new way to estimate hybrid star characteristics based on quark matter phases.

Abstract

To obtain the equation of state of quark matter and construct hybrid stars, we calculate the thermodynamic potential in the three-flavor Nambu-Jona-Lasinio model including the tensor-type four-point interaction and the Kobayashi-Maskawa-'t Hooft interaction. To construct the hybrid stars, it is necessary to impose the beta-equilibrium and charge neutrality conditions on the system. It is shown that tensor condensed phases appear at large chemical potential. Under the possibility of the existence of the tensor condensates, the relationship between the radius and mass of hybrid stars is estimated.