Masses of the 70- Baryons in Large Nc QCD
High Energy Physics - Phenomenology
2014-11-17 v2
Abstract
The masses of the negative parity 70-plet baryons are analyzed in large N_c QCD to order 1/N_c and to first order in SU(3) symmetry breaking. The existing experimental data are well reproduced and twenty new observables are predicted. The leading order SU(6) spin-flavor symmetry breaking is small and, as it occurs in the quark model, the subleading in 1/N_c hyperfine interaction is the dominant source of the breaking. It is found that the Lambda(1405) and Lambda(1520) are well described as three-quark states and spin-orbit partners. New relations between splittings in different SU(3) multiplets are found.
Keywords
Cite
@article{arxiv.hep-ph/0111082,
title = {Masses of the 70- Baryons in Large Nc QCD},
author = {C. L. Schat and J. L. Goity and N. N. Scoccola},
journal= {arXiv preprint arXiv:hep-ph/0111082},
year = {2014}
}
Comments
11 pages; references were added and a couple of improvements to the text were made