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}.

arXiv comment10 pages, 4 figures; to appear in Phys. Rev. D

References in corpus (30)

• Weak Decays Beyond Leading Logarithms
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• An inclusive measurement of the photon energy spectrum in b->s gamma decays
• PREDICTING THE MASSES OF BARYONS CONTAINING ONE OR TWO HEAVY QUARKS
• Higher Twist Distribution Amplitudes of the Nucleon in QCD
• Charmed and Bottom Baryons from Lattice NRQCD
• Present Status of Inclusive Rare B Decays
• Masses of heavy baryons in the relativistic quark model
• Study of Exclusive Radiative B Meson Decays
• Flavour Changing Neutral Current Decays of Heavy Baryons: The Case ${\Lambda }_b\to \Lambda \gamma$
• First Observation of Heavy Baryons Σ_b and Σ_b^*
• Direct observation of the strange b baryon Xi_b^{-}
• Measurements of the B -> X_s gamma Branching Fraction and Photon Spectrum from a Sum of Exclusive Final States
• Observation and Mass Measurement of the Baryon ${\Xi }_b^{-}$
• Measurement of $b$ hadron masses in exclusive $J/\psi$ decays with the CDF detector
• Measurement of the B --> K^* gamma Branching Fractions and Asymmetries
• Effective Lagrangian Approach to Weak Radiative Decays of Heavy Hadrons
• Heavy baryon spectroscopy in QCD
• Observation of the Omega_b^- and Measurement of the Properties of the Xi_b^- and Omega_b^-
• Covariant Light-Front Approach for B to K* gamma, K_1 gamma, K*_2 gamma Decays
• CP Violating B ---> s Gamma Decay in Supersymmetric Models
• Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors
• Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino
• Measurement of B-->K*gamma Branching Fractions and Charge Asymmetries
• Light-cone Distribution Amplitudes of Xi and their Applications
• Weak Radiative Decay Lambda_b to Lambda gamma and Quark-Confined Effects in the Covariant Oscillator Quark Model
• Production of Xi_c^0 and Xi_b in Z decays and lifetime measurement of Xi_b
• Note on new interesting baryon channels to measure the photon polarization in b -> s gamma
• Search for radiative b-hadron decays in proton-antiproton collisions at sqrt(s) = 1.8 TeV
• Tree Level Semileptonic ${\Sigma }_b$ to Nucleon Decay in Light Cone QCD Sum Rules

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• Analysis of the semileptonic decay Λ_c->ne^+ν_e
• Higher order light-cone distribution amplitudes of the Lambda baryon
• Search for the radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay
• Radiative $b$-baryon decays to measure the photon and $b$-baryon polarization
• Higher Order Corrections to the Light-cone Distribution Amplitudes of the Sigma baryon
• Rare radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay in the relativistic quark model
• ${\Xi }_b\to \Xi$ form factors from lattice QCD and Standard-Model predictions for ${\Xi }_b\to \Xi {\mu }^{+}{\mu }^{-}$ and ${\Xi }_b\to \Xi \gamma$ decays
• Radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay