Breached pairing superfluidity: Possible realization in QCD

Abstract

We propose a wide universality class of gapless superfluids, and analyze a limit that might be realized in quark matter at intermediate densities. In the breached pairing color superconducting phase heavy $s$-quarks, with a small Fermi surface, pair with light $u$ or $d$ quarks. The groundstate has a superfluid and a normal Fermi component simultaneously. We expect a second order phase transition, as a function of increasing density, from the breached pairing phase to the conventional color-flavor locked (CFL) phase.

5 pages, latex, 1 figure; added references; Comment on Ref. [10] changed

References in corpus (10)

• Color-Flavor Locking and Chiral Symmetry Breaking in High Density QCD
• Interior Gap Superfluidity
• Crystalline Color Superconductivity
• Gapless two-flavor color superconductor
• Absence of two-flavor color-superconductivity in compact stars
• The Crystallography of Color Superconductivity
• Quark Description of Hadronic Phases
• Superfluidity in the interior-gap states
• Gapless Color Superconductivity
• Mass-Induced Crystalline Color Superconductivity

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