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

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.

18 pages and 1 figure. REVTeX. New references and Appendix C with a discussion of the gauge invariance in color superconductivity are added. To appear in Phys. Rev. D

References in corpus (1)

• Domain walls of high-density QCD

Cited by in corpus (7)

• Color superconductivity in dense quark matter
• Two lectures on color superconductivity
• Effect of color superconductivity on the mass and radius of a quark star
• Longitudinal gluons and Nambu-Goldstone bosons in a two-flavor color superconductor
• Inhomogeneity driven by Higgs instability in gapless superconductor
• Resummed one-loop gluonic contributions to the color superconducting color charge density vanish
• Some aspects of color superconductivity: an introduction