Masses of the Goldstone modes in the CFL phase of QCD at finite density

Details Masses of the Goldstone modes in the CFL phase of QCD at finite density Masses of the Goldstone modes in the CFL phase of QCD at finite density

2000-01-12

arxiv.org/abs/hep-ph/0001095v2

Phys.Lett. B479 (2000) 190-200

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 figures; Discussion of quark mass effects at very large densities amended, references added

Scientific paper

10.1016/S0370-2693(00)00331-2

We construct the U_L(3) x U_R(3) effective lagrangian which encodes the dynamics of the low energy pseudoscalar excitations in the Color-Flavor-Locking superconducting phase of QCD at finite quark density. We include the effects of instanton-induced interactions and study the mass pattern of the pseudoscalar mesons. A tentative comparison with the analytical estimate for the gap suggests that some of these low energy momentum modes are not stable for moderate values of the quark chemical potential.

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