Analysis of 56-plet positive parity baryon decays in the 1/N{sub c} expansion
- Department of Physics, Hampton University, Hampton, Virginia 23668 (United States)
- Physics Department, Comision Nacional de Energia Atomica, 1429 Buenos Aires (Argentina)
The partial decay widths of positive parity baryons belonging to 56-plets of SU(6) are analyzed in the framework of the 1/N{sub c} expansion. The channels considered are those with emission of a single {pi}, K, or K meson, and the analysis is carried out to subleading order in 1/N{sub c} and to first order in SU(3) symmetry breaking. The results for the multiplet [56,0{sup +}], to which the Roper resonance belongs, indicate a poor description of the widths at leading order, requiring important next to leading order corrections. For the multiplet [56,2{sup +}], the P wave decays in the nonstrange sector are well described at leading order, while the F wave decays require the next to leading order corrections, which turn out to be of natural magnitude. SU(3) breaking effects are poorly determined, because only few decays with a K meson in the final state are established, and their widths are not known with sufficient accuracy.
- OSTI ID:
- 21325242
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 7; Other Information: DOI: 10.1103/PhysRevD.80.074027; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Partial decay widths of negative parity baryons in the 1/N{sub c} expansion
Negative parity baryon decays in the 1/N{sub c} expansion