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

V. A. Miransky·I. A. Shovkovy·L. C. R. Wijewardhana
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Abstract

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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V. A. Miransky, I. A. Shovkovy, L. C. R. Wijewardhana. 2001-07-17. Masses of the pseudo-Nambu-Goldstone bosons in two flavor color superconducting phase. https://doi.org/10.1103/physrevd.64.096002

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