Analysis of the [56,2+] baryon masses in the 1/Nc expansion

Analysis of the [56,2+] baryon masses in the 1/Nc expansion

The mass spectrum of the positive parity [56,2+] baryons is studied in the 1/Nc expansion up to and including O(1/Nc) effects with SU(3) symmetry breaking implemented to first order. A total of eighteen mass relations result, several of which are tested with the available data. The breaking of spin-...

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Bibliographic Details
Published in:Physics letters. B Vol. 564; no. 1-2; pp. 83 - 89
Main Authors: Goity, J.L., Schat, C., Scoccola, N.N.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-07-2003
Online Access:Get full text
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Summary:The mass spectrum of the positive parity [56,2+] baryons is studied in the 1/Nc expansion up to and including O(1/Nc) effects with SU(3) symmetry breaking implemented to first order. A total of eighteen mass relations result, several of which are tested with the available data. The breaking of spin-flavor symmetry is dominated by the hyperfine interactions, while spin–orbit effects are found to be small.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(03)00700-7