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arXiv · hep-ph/0512104

Single-flavour and two-flavour pairing in three-flavour quark matter

Mark Alford·Greig Cowan
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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.

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Mark Alford, Greig Cowan. 2005-12-08. Single-flavour and two-flavour pairing in three-flavour quark matter. https://doi.org/10.1088/0954-3899%2F32%2F4%2F009

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