Bayesian analysis of NICER and small-radius pulsar data favors a strong first-order phase transition at 2.7-2.8 nuclear densities with a 600-700 MeV energy jump and high post-transition sound speed, producing twin stars of 6-7 km radius and strongly suppressed tidal deformability.
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Diquark coupling in the NJL model is fixed near 1.5 times the scalar coupling and vector coupling below 1.1 times, yielding crossover equations of state that raise maximum neutron star masses and produce distinct radial oscillation frequencies potentially detectable as quark-matter signatures.
citing papers explorer
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Bayesian Inference of Dense-Matter Equations of State from Small-Radius Compact Stars with Twin-Star Scenarios
Bayesian analysis of NICER and small-radius pulsar data favors a strong first-order phase transition at 2.7-2.8 nuclear densities with a 600-700 MeV energy jump and high post-transition sound speed, producing twin stars of 6-7 km radius and strongly suppressed tidal deformability.
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Crossover Equation of State Constrained by Astronomical Observations and pQCD
Diquark coupling in the NJL model is fixed near 1.5 times the scalar coupling and vector coupling below 1.1 times, yielding crossover equations of state that raise maximum neutron star masses and produce distinct radial oscillation frequencies potentially detectable as quark-matter signatures.