Speaker
Description
Hadronic stars and strange quark stars could coexist within the two-families scenario, where hadronic and strange quark matter correspond to two distinct equilibrium phases described by separate equations of state (EOS). This work explores the EOS of dense matter through both statistical inference and microscopic modeling. First, we perform a detailed Bayesian analysis utilizing astrophysical and laboratory data to constrain the parameterized EOS models adopted within the two-families framework, accounting for hyperon and $\Delta$-resonance formation in the hadronic phase and a color-superconducting phase in the quark matter. The Bayesian model comparison indicates that the two-families scenario is favored over the standard one-family scenario. Second, to advance the microscopic description of the hadronic phase, we present a EOS for strongly interacting matter valid across a wide range of temperatures and densities. This EOS is based on an effective Lagrangian with broken chiral symmetry that includes contributions from the baryon and meson ($\sigma, \pi, \omega, \rho$) sectors. In this framework, scale-invariance breaking is regulated by a dilaton field mimicking QCD gluon condensate dynamics, and thermal field fluctuations are incorporated beyond standard mean-field approximations.