Meson current in the CFL phase

Details Meson current in the CFL phase Meson current in the CFL phase

2006-03-30

arxiv.org/abs/hep-ph/0603257v2

Phys.Rev. D73 (2006) 125022

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 figures, v2: minor improvements, results unchanged

Scientific paper

10.1103/PhysRevD.73.125022

We study the stability of the color-flavor locked (CFL) phase of dense quark matter with regard to the formation of a non-zero Goldstone boson current. We show that an instability appears in the vicinity of the point $\mu_s=\Delta$ which marks the appearance of gapless fermion modes in the CFL phase. Here, $\mu_s=m_s^2/(2\mu)$ is the shift in chemical potential due to the strange quark mass and $\Delta$ is the gap in the chiral limit. We show that in the Goldstone boson current phase all components of the magnetic screening mass are real. In this work we do not take into account homogeneous kaon condensation. We study the effects of an instanton induced interaction of the magnitude required to suppress kaon condensation.

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