Masses of the pseudo-Nambu-Goldstone bosons in two flavor color superconducting phase

Details Masses of the pseudo-Nambu-Goldstone bosons in two flavor color superconducting phase Masses of the pseudo-Nambu-Goldstone bosons in two flavor color superconducting phase

2001-04-19

arxiv.org/abs/hep-ph/0104194v2

Phys.Rev. D64 (2001) 096002

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages and 1 figure. REVTeX. New references and Appendix C with a discussion of the gauge invariance in color superconductiv

Scientific paper

10.1103/PhysRevD.64.096002

The masses of the pseudo-Nambu-Goldstone bosons in the color superconducting phase of dense QCD with two light flavors are estimated by making use of the Cornwall-Jackiw-Tomboulis effective action. Parametrically, the masses of the doublet and antidoublet bosons are suppressed by a power of the coupling constant as compared to the value of the superconducting gap. This is qualitatively different from the mass expression for the singlet pseudo-Nambu-Goldstone boson, resulting from non-perturbative effects. It is argued that the (anti-) doublet pseudo-Nambu-Goldstone bosons form colorless [with respect to the unbroken SU(2)_{c}] charmonium-like bound states. The corresponding binding energy is also estimated.

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