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New class of compact stars: Pion stars

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arxiv 1802.06685 v3 pith:YTV4UUKV submitted 2018-02-19 hep-ph astro-ph.HEhep-latnucl-th

Bastian B. Brandt , Gergely Endrodi , Eduardo S. Fraga , Mauricio Hippert , Jurgen Schaffner-Bielich , Sebastian Schmalzbauer This is my paper · ORCID
classification hep-phastro-ph.HEhep-latnucl-th
keywords chargedcompactpionstarsbose-einsteinboundchemicalclass
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We investigate the viability of a new type of compact star whose main constituent is a Bose-Einstein condensate of charged pions. Several different setups are considered, where a gas of charged leptons and neutrinos is also present. The pionic equation of state is obtained from lattice QCD simulations in the presence of an isospin chemical potential, and requires no modeling of the nuclear force. The gravitationally bound configurations of these systems are found by solving the Tolman-Oppenheimer-Volkov equations. We discuss weak decays within the pion condensed phase and elaborate on the generation mechanism of such objects.

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  1. Renormalization group invariant mean-field model for QCD at finite isospin density

    hep-ph 2025-02 conditional novelty 6.0 of 10

    A renormalization-group invariant mean-field quark-meson model with one fitted scale reproduces lattice QCD thermodynamics at finite isospin density and predicts a multicritical chiral/pion-condensation point in the c...

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