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New Relations for Excited Baryons in Large N_c QCD | | Thomas D. Cohen
; Richard F. Lebed
; | | Date: |
20 Dec 2002 | | Journal: | Phys.Rev.Lett. 91 (2003) 012001 | | Subject: | hep-ph | | Abstract: | We show that excited baryons in large N_c QCD form multiplets, within which masses are first split at O(1/N_c). The dominant couplings of resonances to various mesons are highly constrained: The N(1535) decays at leading 1/N_c order exclusively to eta-N rather than pi-N, and vice versa for the N(1650). This multiplet structure is reproduced by a simple large N_c quark model, well studied in the literature, that describes resonances as single-quark excitations. | | Source: | arXiv, hep-ph/0301167 | | Services: | Forum | Review | PDF | Favorites | |
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