Single-flavor and two-flavor pairing in three-flavor quark matter
Dec, 2005Citations per year
Abstract:
We study single-flavour quark pairing (self-pairing) in colour-superconducting phases of quark matter, paying particular attention to the difference between scenarios where all three flavours undergo single-flavour pairing, and scenarios where two flavours pair with each other (2SC pairing) and the remaining flavour self-pairs. We perform our calculations in the mean field approximation using a pointlike four-fermion interaction based on single gluon exchange. We confirm the result from previous weakly-coupled-QCD calculations, that when all three flavours self-pair the favored channel for each is colour-spin-locked (CSL) pseudoisotropic pairing. However, we find that when the up and down quarks undergo 2SC pairing, they induce a colour chemical potential that disfavors the CSL phase. The strange quarks then self-pair in a polar channel that breaks rotational invariance, although the CSL phase may survive in a narrow range of densities.Note:
- 12 pages, RevTeX
- 25.75.Nq
- 12.38.-t
- quark matter
- colour superconductivity
- 2SC
- CSL
- neutrality
- free energy
- quark: matter
- flavor: 3
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