Large N{sub c}
- Department of Physics, University of California at San Diego, La Jolla, CA 92093-0319 (United States)
The 1/N{sub c} expansion of QCD with N{sub c} = 3 has been successful in explaining a wide variety of QCD phenomenology. Here I focus on the contracted spin-flavor symmetry of baryons in the large-N{sub c} limit and deviations from spin-flavor symmetry due to corrections suppressed by powers of 1/N{sub c}. Baryon masses provide an important example of the 1/N{sub c} expansion, and successful predictions of masses of heavy-quark baryons continue to be tested by experiment. The ground state charmed baryon masses have all been measured, and five of the eight ground state bottom baryon masses have been found. Results of the 1/N{sub c} expansion can aid in the discovery of the remaining bottom baryons. The brand new measurement of the {omega}{sub b}{sup -} mass by the CDF collaboration conflicts with the original D0 discovery value and is in excellent agreement with the prediction of the 1/N{sub c} expansion.
- OSTI ID:
- 21325668
- Journal Information:
- AIP Conference Proceedings, Vol. 1182, Issue 1; Conference: 10. conference on the intersections of particle and nuclear physics, San Diego, CA (United States), 26-31 May 2009; Other Information: DOI: 10.1063/1.3293846; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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