Analysis of 56-plet Positive Parity Baryon Decays in the 1/Nc Expansion
The partial decay widths of positive parity baryons belonging to 56-plets of SU(6) are analyzed in the framework of the 1/Nc expansion. The channels considered are those with emission of a single pion, K or K-bar mesons, and the analysis is carried out to subleading order in 1/Nc and to first order in SU(3) symmetry breaking. The results for the multiplet [56,0+], to which the Roper resonance belongs, indicate a poor description at leading order, requiring large next to leading order corrections. For the multiplet [56,2+], the P-wave decays in the non-strange sector are well described at leading order and important SU(3) breaking corrections are necessary to describe transitions involving strangeness, on the other hand, the F-wave decays require the next to leading order corrections, which turn out to be however of natural magnitude.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 978579
- Report Number(s):
- JLAB-THY-09-1020; DOE/OR/23177-0897; PRVDAQ; TRN: US1003007
- Journal Information:
- Physical Review D, Vol. 80, Issue 07; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Negative parity baryon decays in the 1/N{sub c} expansion
Negative Parity 70-plet Baryon Masses in the 1/N{sub c} Expansion