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

TL;DR

This paper calculates the decay widths and branching ratios of rare radiative decays of heavy b-baryons Sigma_b and Xi_b using QCD light-cone sum rules, providing theoretical predictions for these processes.

Contribution

It introduces a new calculation of transition form factors and decay widths for Sigma_b and Xi_b rare decays using QCD light-cone sum rules, offering predictions for experimental verification.

Findings

Predicted decay width for Sigma_b->Sigma gamma: (7.21±0.04)×10^{-18} GeV

Predicted decay width for Xi_b->Xi gamma: (1.34±0.07)×10^{-16} GeV

Branching ratio for Xi_b->Xi gamma: (3.03±0.10)×10^{-4}

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(\Xi_b->Xi gamma)=(3.03\pm0.10)\times10^{-4}.