The exclusive rare decay b->s gamma of heavy b-Baryons

Abstract

We present an analysis on the exclusive rare radiative decay modes Sigma_b->Sigma gamma and Xi_b->Xi gamma. The transition form factors which parameterize these processes are calculated using QCD light-cone sum rules. The decay widths we predict are Gamma(Sigma_b->Sigma gamma)=(7.21\pm0.04)\times10^{-18}GeV} and Gamma(Xi_b->Xi gamma)=(1.34\pm0.07)\times10^{-16}GeV. The Branching ratio of Xi_b->Xi gamma is predicted to be Br(Ξ_b->Xi gamma)=(3.03\pm0.10)\times10^{-4}.

10 pages, 4 figures; to appear in Phys. Rev. D

References in corpus (7)

• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Direct observation of the strange b baryon Xi_b^{-}
• Heavy baryon spectroscopy in QCD
• Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors
• Light-cone Distribution Amplitudes of Xi and their Applications
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Cited by in corpus (2)

• Higher order light-cone distribution amplitudes of the Lambda baryon
• Rare radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay in the relativistic quark model