Pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities

Details Pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities Pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities

2007-07-04

arxiv.org/abs/0707.0632v1

Phys.Rev.D76:074024,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 12 figures

Scientific paper

10.1103/PhysRevD.76.074024

The properties of the pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities are studied within a model of the Nambu--Jona-Lasinio type. The Goldstone bosons are constructed explicitly by solving the Bethe-Salpeter equation for quark-quark scattering in random phase approximation. Main focus of our investigations are (i) the weak decay constant in the chiral limit, (ii) the masses of the flavored (pseudo-) Goldstone bosons for non-zero but equal quark masses, (iii) their masses and effective chemical potentials for non-equal quark masses, and (iv) the onset of kaon condensation. We compare our results with the predictions of the low-energy effective field theory. The deviations from results obtained in the weak-coupling limit are discussed in detail.

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