Decays of negative parity non-strange baryons in the 1/Nc expansion
The decays of non-strange negative parity baryons via the emission of single {pi} and {eta} mesons are analyzed in the framework of the 1/N{sub c} expansion. A basis of spin-flavor operators is established to that order, and with this basis the different partial wave decay amplitudes are obtained. The unknown effective coefficients are determined by fitting to the S- and D-wave partial widths as provided by the PDG. A full set of relations between widths that result at the leading order, i.e. order N{sub c0}, is given and tested with the data. The rather large errors of the input partial widths, that result from the often discrepant results for the resonance parameters from different analyses of the data, lead to a rather good fit at the leading order N{sub c0}. The next to leading order fit fails for that reason to pin down with satisfactory accuracy the effective sub leading effective constants.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 834119
- Report Number(s):
- JLAB-THY-04-37; DOE/ER/40150-2955; TRN: US0407042
- Resource Relation:
- Other Information: No journal information given for this preprint; PBD: 1 Apr 2004
- Country of Publication:
- United States
- Language:
- English
Similar Records
Decays of non-strange positive parity excited baryons in the 1/Nc expansion
Analysis of 56-plet Positive Parity Baryon Decays in the 1/Nc Expansion