Abstract
With an interpolation method on the P-μ plane, a hybrid equation of state is explored. The quark phase is described by a self-consistent two-flavor Nambu–Jona-Lasinio model. It retains the contribution from the vector channel in the Fierz-transformed Lagrangian by introducing a weighting parameter α. We study the dependence of hybrid EOS and mass-radius relation on α. It is found that increasing α makes the hybrid EOS softer. We can get stellar mass larger than 2M⊙. Further, we calculate the tidal deformability Λ˜ for binary stars and compare it with some theoretical analysis results on GW170817.
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