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arXiv · 0707.0632

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

Verena Kleinhaus·Michael Buballa·Dominik Nickel·Micaela Oertel
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Abstract

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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Verena Kleinhaus, Michael Buballa, Dominik Nickel, Micaela Oertel. 2007-07-04. Pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities. https://doi.org/10.1103/physrevd.76.074024

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