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Hybrid stars from the NJL model with a tensor-interaction

Authors: H. Matsuoka, Y. Tsue, J. da Providencia, C. Providencia, M. Yamamura

Ref.: Phys. Rev. D 98, 074027 (2018)

Abstract: In order to obtain the equation of state and construct hybrid stars, we calculate the thermodynamic potential in the two-flavor Nambu--Jona-Lasinio model with tensor-type four-point interaction between quarks. In addition, we impose the beta-equilibrium and charge neutrality conditions on the system. We show that the tensor condensate appears at large chemical potential, however, it is difficult to hold hybrid stars with two-solar mass by using the equation of state with the tensor-interaction. However, if we make the coupling constant of the tensor-interaction large enough, we can obtain the hybrid star and quark star with two-solar mass.

DOI: https://doi.org/10.1103/PhysRevD.98.074027

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