Random matrix model for chiral and color-flavor locking condensates

Details Random matrix model for chiral and color-flavor locking condensates Random matrix model for chiral and color-flavor locking condensates

2011-08-05

arxiv.org/abs/1108.1274v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 4 figures

Scientific paper

We study the phase diagram of a chiral random matrix model with three quark flavors at finite temperature and chemical potential, taking the chiral and diquark condensates as independent order parameters. Fixing the ratio of the coupling strengths in the quark-antiquark and quark-quark channels applying the Fierz transformation, we find that the color-flavor locked (CFL) phase is realized at large chemical potential, while the ordinary chirally-broken phase appears in the region with small chemical potential. We investigate responses of the phases by changing small quark masses in the cases with three equal-mass flavors and with 2+1 flavors. In the case with three equal-mass flavors, we find that the finite masses make the CFL phase transition line move to the higher density region. In the case with 2+1 flavors, we find the two-flavor color superconducting phase at the medium density region as a result of the finite asymmetry between the flavors, as well as the CFL phase at higher density region.

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