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Self-Consistent Determination of Coupling Shifts in Broken SU(3)

Dashen, R. F. and Dothan, Y. and Frautschi, S. C. and Sharp, D. H. (1966) Self-Consistent Determination of Coupling Shifts in Broken SU(3). Physical Review, 143 (4). pp. 1185-1190. ISSN 0031-899X. doi:10.1103/PhysRev.143.1185.

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The possibility that certain patterns of SU(3) symmetry breaking are dynamically enhanced in baryon-meson couplings is studied by bootstrap methods. For the strong couplings, a single dominant enhancement is found. It produces very large symmetry-breaking terms, transforming like an octet, as often conjectured. Experimental consequences are listed, such as a reduction of K-baryon couplings relative to π-baryon couplings which is in accord with the experimental weakness of K relative to π production in many circumstances, such as photoproduction and multi-BeV cosmic-ray collisions. For parity-violating nonleptonic couplings, a dominant octet enhancement is again found, as mentioned in a previous paper, which leads to an excellent fit with experiment. For parity-conserving nonleptonic couplings, on the other hand, several different enhancements compete, and the only conclusion we can draw is that terms with the "abnormal" transformation properties brought in by strong symmetry-breaking corrections are present. Our work provides a dynamical derivation of various phenomenological facts associated with SU(6), such as the dominance of the 35 representation in parity-violating nonleptonic decays.

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Additional Information:© 1966 The American Physical Society. Received 22 September 1965; revised 15 November 1965; published in the issue dated March 1966. Work supported in part by the U. S. Atomic Energy Commission. Prepared under Contract AT(11-1)-68 for the San Francisco Operations Office, U. S. Atomic Energy Commission. All the authors wish to offer their warmest thanks to Barbara Zimmerman for programming the extensive numerical calculations, without which this work would not have been possible.
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Atomic Energy CommissionAT(11-1)-68
Issue or Number:4
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Official Citation:Dashen, R. F., Y. Dothan, et al. (1966). "Self-Consistent Determination of Coupling Shifts in Broken SU(3)." Physical Review 143(4): 1185-1190.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33351
Deposited On:20 Aug 2012 17:53
Last Modified:09 Nov 2021 21:34

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