Chiral Lagrangian for baryons in the 1/{ital N}{sub {ital c}} expansion
- Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)
A 1/{ital N}{sub {ital c}} expansion of the chiral Lagrangian for baryons is formulated and used to study the low-energy dynamics of baryons interacting with the pion nonet {pi}, {ital K}, {eta}, and {eta}{sup {prime}} in a combined expansion in chiral symmetry breaking and 1/{ital N}{sub {ital c}}. Strong {ital CP} violation is included. The chiral Lagrangian correctly implements nonet symmetry and contracted spin-flavor symmetry for baryons in the large {ital N}{sub {ital c}} limit. The implications of nonet symmetry for low-energy baryon-pion interactions are described in detail. The procedure for calculating nonanalytic pion-loop corrections to baryon amplitudes in the 1/{ital N}{sub {ital c}} expansion for finite {ital N}{sub {ital c}} is explained. Flavor-{bold 27} baryon mass splittings are calculated at leading order in chiral perturbation theory as an example. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Univ. of California (United States)
- DOE Contract Number:
- FG03-90ER40546
- OSTI ID:
- 279182
- Journal Information:
- Physical Review, D, Vol. 53, Issue 5; Other Information: PBD: Mar 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Baryon masses at second order in large-{ital N} chiral perturbation theory
Baryon magnetic moments in a simultaneous expansion in 1/[ital N] and [ital m][sub [ital s]]