The exclusive rare decay b->s gamma of heavy b-Baryons
  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(\Xi_b->Xi gamma)=(3.03\pm0.10)\times10^{-4}. 
Yong-lu Liu, Long-fei Gan and Ming-qiu Huang
hep-ph