ASYMMETRY IN THE DECAY OMEGA(-)-]XI(-)GAMMA

Citation
G. Eilam et al., ASYMMETRY IN THE DECAY OMEGA(-)-]XI(-)GAMMA, Modern physics letters A, 11(26), 1996, pp. 2091-2094
Citations number
20
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields","Physycs, Mathematical
Journal title
ISSN journal
02177323
Volume
11
Issue
26
Year of publication
1996
Pages
2091 - 2094
Database
ISI
SICI code
0217-7323(1996)11:26<2091:AITDO>2.0.ZU;2-P
Abstract
We consider the asymmetry in the decay Omega(-) --> Xi(-)gamma assumin g that a vector meson dominance approach for the s --> d transition gi ves the dominant contribution. Since in this long-distance approximati on the decay is due to a single quark transition s --> d gamma, the an gular distribution asymmetry is given by the single positive asymmetry parameter alpha(h) = M(s)(2) - M(d)(2)/M(s)(2) + M(d)(2) = 0.4 +/- 0. 1. We also discuss the asymmetry in Xi --> Sigma(-)gamma, which is exp ected to be between -0.2 and 0.3.