Possibility of s-wave pion condensates in neutron stars revisited

Abstract

We examine possibilities of pion condensation with zero momentum (s-wave condensation) in neutron stars by using the pion-nucleus optical potential U and the relativistic mean field (RMF) models. We use low-density phenomenological optical potentials parameterized to fit deeply bound pionic atoms or pion-nucleus elastic scatterings. Proton fraction (Y_p) and electron chemical potential (mu_e) in neutron star matter are evaluated in RMF models. We find that the s-wave pion condensation hardly takes place in neutron stars and especially has no chance if hyperons appear in neutron star matter and/or b_1 parameter in U has density dependence.

4 pages, 3 figures, REVTeX

References in corpus (6)

• Tables of Hyperonic Matter Equation of State for Core-Collapse Supernovae
• Neutrino signals from the formation of black hole: a probe of equation of state of dense matter
• In-medium Pion and Partial Restoration of Chiral Symmetry
• Pion and Kaon Condensation at Finite Temperature and Density
• A chiral symmetric relativistic mean field model with logarithmic sigma potential
• The s-wave pion-nucleus optical potential

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• An Undergraduate Approach to the Quantum Hadrodynamics and the Physics of Neutron Stars Part II: Neutron Stars' Exotic Content
• Pions near condensation under compact star conditions