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arxiv 0710.5384 v2 pith:D4PC5HNL submitted 2007-10-29 astro-ph nucl-th

Structure of hybrid protoneutron stars within the Nambu--Jona-Lasinio model

G.F.Burgio , S. Plumari (INFN Sezione di Catania , Dipartimento di Fisica e Astronomia , Universita' di Catania , Italy) This is my paper
classification astro-ph nucl-th
keywords protoneutronstarshadronichybridmassesmattermodelnambu--jona-lasinio
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We investigate the structure of protoneutron stars (PNS) formed by hadronic and quark matter in $\beta$-equilibrium described by appropriate equations of state (EOS). For the hadronic matter, we use a finite temperature EOS based on the Brueckner-Bethe-Goldstone many-body theory, with realistic two- and three-body forces. For the quark sector, we employ the Nambu--Jona-Lasinio model. We find that the maximum allowed masses are comprised in a narrow range around 1.8 solar masses, with a slight dependence on the temperature. Metastable hybrid protoneutron stars are not found.

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  1. Characterizing the quark-hadron mixed phase in compact star cores : sensitivity to nuclear saturation and quark-model parameters at finite-temperature

    nucl-th 2026-05 unverdicted novelty 4.0

    The quark-hadron mixed phase width in hybrid stars is mainly controlled by effective nucleon mass and symmetry energy, with temperature reducing the width and softening the EOS while strong vector repulsion is needed ...