Color-superconducting ’t Hooft interaction
Andrew W. Steiner
DOI 10.1103/PhysRevD.72.054024 · Physical Review D
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Abstract
We consider the effect of a six-fermion interaction of the t’Hooft form in the quark-quark channel on the ground state of matter at finite density. The coupling constant for this new term is varied within the limits suggested by naturalness. The flavor-mixing effects of the additional term destabilize the color-flavor-locked and, to a lesser extent, the two-flavor color-superconducting phases of quark matter, especially for positive values of the coupling. For some values of the coupling, the critical density for color-flavor-locked phase is nearly larger than the maximum density in the neutron stars. We comment on the implications for neutron-star evolution.
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