Neutrino Emission From Direct Urca Processes in Pion Condensed Quark Matter

Abstract

We study neutrino emission from direct Urca processes in pion condensed quark matter. In compact stars with high baryon density, the emission is dominated by the gapless modes of the pion condensation which leads to an enhanced emissivity. While for massless quarks the enhancement is not remarkable, the emissivity is significantly larger and the cooling of the condensed matter is considerably faster than that in normal quark matter when the mass difference between $u$- and $d$-quarks is sizable.

arXiv comment12 pages,6 figures, published version

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• Non-Fermi liquid corrections to the neutrino mean free path in dense quark matter
• Possible $D^{(\ast )}{\bar{D}}^{(\ast )}$ and $B^{(\ast )}{\bar{B}}^{(\ast )}$ molecular states in the extended constituent quark models
• Next to leading order non Fermi liquid corrections to the neutrino emissivity and cooling of the neutron star
• Astrophysical aspects of neutrino dynamics in ultra-degenerate quark gluon plasma