Rare radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay in the relativistic quark model

Abstract

Recently the LHCb collaboration put the upper limit on the ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay branching ratio $Br({\Xi }_b^{-}\to {\Xi }^{-}\gamma )<1.3\times 10^{-4}$. The measured value is below the light-cone sum rule prediction. In this paper the rare radiative decay of the ${\Xi }_b^{-}$ baryon is studied in the framework of the relativistic quark model based on the quasipotential approach and QCD. The decay form factors are calculated with the comprehensive account of the relativistic effects. The obtained result for the branching ratio is found to be below the upper limit set by LHCb and is consistent with theoretical predictions based on the SU(3) flavor-symmetry, light-front quark model and light-cone QCD sum rules in full theory within theoretical uncertainties.

arXiv comment8 pages

References in corpus (8)

• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• Leading Order QCD Corrections to $b\to s\gamma$ and $b\to sg$ Decays in Three Regularization Schemes
• Strange baryon spectroscopy in the relativistic quark model
• First observation of the radiative decay ${\Lambda }_b^0\to \Lambda \gamma$
• Rare ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ and ${\Lambda }_b\to \Lambda \gamma$ decays in the relativistic quark model
• Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model
• The exclusive rare decay b->s gamma of heavy b-Baryons
• Search for the radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay

Cited by in corpus (1)

• ${\Xi }_b\to \Xi$ form factors from lattice QCD and Standard-Model predictions for ${\Xi }_b\to \Xi {\mu }^{+}{\mu }^{-}$ and ${\Xi }_b\to \Xi \gamma$ decays