2007/07/04 by Verena Kleinhaus, Michael Buballa, Dominik Nickel +1 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.76.074024
published as Phys.Rev.D76:074024,2007 · 18 pages, 12 figures
arxiv created 2007/07/04 · openalex publication_date 2007/10/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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. The main focuses of our investigations are (i) the weak decay constant in the chiral limit, (ii) the masses of the flavored (pseudo)Goldstone bosons for nonzero but equal quark masses, (iii) their masses and effective chemical potentials for nonequal 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.