Asymmetry in the decay $Ω^-\toΞ^-γ$

Details Asymmetry in the decay $Ω^-\toΞ^-γ$ Asymmetry in the decay $Ω^-\toΞ^-γ$

1996-04-30

arxiv.org/abs/hep-ph/9604435v1

Mod.Phys.Lett. A11 (1996) 2091-2094

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages,no figures,LateX

Scientific paper

We consider the asymmetry in the decay $\Omega^-\rightarrow\Xi^-\gamma$ assuming that a Vector Meson Dominance approach for the $s\rightarrow d\gamma$ transition gives the dominant contribution. Since in this long-distance approximation the decay is due to a single quark transition $s\rightarrow d\gamma$, the angular distribution asymmetry is given by the single positive asymmetry parameter $\alpha_h = \frac{M^2_s-M^2_d}{M^2_s+M^2_d} = 0.4\pm0.1$. We also discuss the asymmetry in $\Xi \rightarrow \Sigma^-\gamma$, which is expected to be between -0.2 and 0.3.

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