Highly Excited Baryons in Large-Nc QCD
- Physique theorique fondamentale, Departement de Physique, Universite de Liege, allee du 6 Aout 17, bat. B5, B-4000 Liege 1 (Belgium)
We use the 1/Nc expansion of QCD to analyse the spectrum of positive parity resonances with strangeness S = 0, -1, -2 and -3 in the 2-3 GeV mass region, supposed to belong to the [56,4+] multiplet. The mass operator is similar to that of [56,2+], previously studied in the literature. The analysis of the latter is revisited. In the [56,4+] multiplet we find that the spin-spin term brings the dominant contribution and that the spin-orbit term is entirely negligible in the hyperfine interaction, in agreement with the constituent quark model practice, where this interaction is usually neglected. More data are strongly desirable, especially in the strange sector in order to fully exploit the power of this approach. We discuss possibilities of extending the calculations to other excited baryons belonging to the N = 2 or the N = 4 band.
- OSTI ID:
- 20722852
- Journal Information:
- AIP Conference Proceedings, Vol. 775, Issue 1; Conference: HLPR 2004: Joint meeting Heidelberg-Liege-Paris-Rostock on hadronic physics, Spa (Belgium), 16-18 Dec 2004; Other Information: DOI: 10.1063/1.1961039; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analysis of 56-plet Positive Parity Baryon Decays in the 1/Nc Expansion
Masses of the 70- Baryons in Large Nc QCD