Light plasmon mode in the CFL phase
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The self-energies and the spectral densities of longitudinal and transverse gluons at zero temperature in the color-flavor-locked (CFL) phase are calculated. There appears a collective excitation, a light plasmon, at energies smaller than two times the gap parameter and momenta smaller than about eight times the gap. The minimum in the dispersion relation of this mode at some nonzero value of momentum corresponds to the van Hove singularity.
4 pages, 4 figures, Talk given by H. Malekzadeh, to appear in the proceedings of the conference "Quark Confinement and the Hadron Spectrum VII" (QCHS7), Ponta Delgada, 2 - 7 September 2006
4 pages, 4 figures, Talk given by H. Malekzadeh, to appear in the proceedings of the conference "Quark Confinement and the Hadron Spectrum VII" (QCHS7), Ponta Delgada, 2 - 7 September 2006