2008/08/26 by Verena Kleinhaus, Michael Buballa · 4 citations
Physics and Astronomy · #Boson #Goldstone boson #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quark #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.79.014016
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 79(1) (American Physical Society) · 8 pages, 8 figures
arxiv created 2008/08/26 · openalex publication_date 2009/01/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The properties of pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities are studied within a model of the Nambu--Jona-Lasinio type. Our previous analysis [V. Kleinhaus, M. Buballa, D. Nickel, and M. Oertel, Phys. Rev. D 76, 074024 (2007).] is extended to Goldstone bosons with hidden flavor and to higher-lying modes which stay massive in the chiral limit. The bosons are constructed explicitly by solving the Bethe-Salpeter equation for quark-quark scattering in random phase approximation. The masses and weak decay constants of the Goldstone bosons are found in good agreement with predictions from the low-energy effective theory. In the non-Goldstone sector we find an SU(3) octet which is weakly bound, while the singlet appears to be unbound.