Pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities
Abstract
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. DPRVDAQ1550-7998 76, 074024 (2007).10.1103/PhysRevD.76.074024] 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.
- Publication:
-
Physical Review D
- Pub Date:
- January 2009
- DOI:
- 10.1103/PhysRevD.79.014016
- arXiv:
- arXiv:0808.3490
- Bibcode:
- 2009PhRvD..79a4016K
- Keywords:
-
- 12.39.-x;
- 11.10.St;
- 11.30.Qc;
- 12.38.-t;
- Phenomenological quark models;
- Bound and unstable states;
- Bethe-Salpeter equations;
- Spontaneous and radiative symmetry breaking;
- Quantum chromodynamics;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 8 pages, 8 figures