Baryon-Antibaryon Contributions to theK20−K10Mass Difference in a Current-Current Quark Model
- 1 November 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 8 (9), 3226-3229
- https://doi.org/10.1103/physrevd.8.3226
Abstract
The baryon-antibaryon contributions to the mass difference are studied in an extended fermion-loop model as a further consistency test of a current-current quark model. It is found that contributions arising from the parity-conserving weak Hamiltonian phenomenologically constructed of one-baryon octet matrix elements are negligible compared to the crude estimate of the mass shift, . Although the contribution to the mass shift arising from the parity-violating weak Hamiltonian via an -wave effective meson-baryon-baryon interaction turns out to be comparable to and negative, the extended loop model is not incompatible with present theoretical understanding of the mass difference.
Keywords
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