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Gluon self-energy in the color-flavor-locked phase

H. Malekzadeh·Dirk H. Rischke
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Abstract

We calculate the self-energies and the spectral densities of longitudinal and transverse gluons at zero temperature in color-superconducting quark matter in the color-flavor-locked (CFL) phase. We find a collective excitation, a plasmon, at energies smaller than two times the gap parameter and momenta smaller than about eight times the gap. The dispersion relation of this mode exhibits a minimum at some nonzero value of momentum, indicating a van Hove singularity.

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H. Malekzadeh, Dirk H. Rischke. 2006-06-08. Gluon self-energy in the color-flavor-locked phase. https://doi.org/10.1103/physrevd.73.114006

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