Quark Hadron Continuity in QCD with one Flavor

Details Quark Hadron Continuity in QCD with one Flavor Quark Hadron Continuity in QCD with one Flavor

2000-06-02

arxiv.org/abs/hep-ph/0006034v2

Phys.Rev. D62 (2000) 094007

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 1 figure, to appear in Phys. Rev. D, reference added, minor corrections

Scientific paper

10.1103/PhysRevD.62.094007

We study QCD with one flavor at finite baryon density. In the limit of very high baryon density the system is expected to be a color superconductor. In the case of one flavor, the order parameter is in a $\bar 3$ of color and has total angular momentum one. We show that in weak coupling perturbation theory, the energetically preferred phase exhibits ``color-spin-locking'', i.e. the color and spin direction of the condensate are aligned. We discuss the properties of this phase and argue that it shares important features of the hadronic phase at low density. In particular, we find an unbroken rotational symmetry, spin 3/2 quasiparticles, and an unusual mechanism for quark-anti-quark condensation. Our results are relevant to three flavor QCD in the regime where the strange quark mass is bigger than the critical value for color-flavor-locking. We find that the gaps in this case are on the order of one MeV.

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