Bethe-Salpeter equation for diquarks in color-flavor locked phase of cold dense QCD

Abstract

The Bethe-Salpeter equations for diquarks with the quantum numbers of the Nambu-Goldstone bosons are analyzed in the color-flavor locked phase of cold dense QCD with three quark flavors. The decay constants and the velocities of the Nambu-Goldstone bosons are calculated in the Pagels-Stokar approximation. It is also shown that, in contrast to the case of dense QCD with two flavors, there are no massive radial excitations with quantum numbers of the Nambu-Goldstone bosons in the color-flavor locked phase. The role of the Meissner effect in the pairing dynamics of diquarks is explained.

14 pages, no figures, REVTeX. An appendix is added. References are slightly rearranged. Typos and an error in Eq.(80) are corrected. To appear in Phys. Rev. D

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• Collective modes of color-flavor locked phase of dense QCD at finite temperature
• Optically opaque color-flavor locked phase inside compact stars
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• Color superconductivity and nondecoupling phenomena in 2+1 dimensional QCD
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• BCS vs Overhauser pairing in dense (2+1)d QCD
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