A QCD Sum Rule Approach to the $s\to d\gamma$ Contribution to the ${\Omega }^{-}\to {\Xi }^{-}\gamma$ Radiative Decay

Abstract

QCD sum rules are used to calculate the contribution of short-distance single-quark transition $s\to d\gamma$, to the amplitudes of the hyperon radiative decay, ${\Omega }^{-}\to {\Xi }^{-}\gamma$. We re-evaluate the Wilson coefficient of the effective operator responsible for this transition. We obtain a branching ratio which is comparable to the unitarity limit.

15 pages, Revtex, 13 figures available as a uuencoded, gz-compressed ps file

References in corpus (3)

• Theoretical Uncertainties and Phenomenological Aspects of $B\to X_s\gamma$ Decay
• Radiative Weak Decays of Charm Mesons
• New Upper Limit for the Branching Ratio of the Omega- to Xi- gamma Radiative Decay

Cited by in corpus (3)

• New Physics and Short-Distance s->d gamma Transition in Omega^- -> Cascade^- gamma Decay
• ${\Sigma }^{+}\to p{\ell }^{+}{\ell }^{-}$ decays within the standard model and beyond
• Can ${\Omega }^{-}\to {\Xi }^{-}\gamma$ be sensitive to new physics beyond the Standard Model ?