Penguin-Induced Radiative Baryonic B Decays

Abstract

Weak radiative baryonic B decays $B\to\B_1\ov \B_2γ$ mediated by the electromagnetic penguin process $b\to s\gamma$ have appreciable rates larger than their two-body counterparts $B\to\B_1\ov \B_2$. The branching ratios for $B^{-}\to \Lambda \bar{p}\gamma$ and $B^{-}\to {\Xi }^0{\bar{\Sigma }}^{-}\gamma$ are sizable, falling into the range of $(1\sim 6)\times 10^{-6}$ with the value preferred to be on the large side, and not far from the bottom baryon radiative decays ${\Lambda }_b\to \Lambda \gamma$ and ${\Xi }_b\to \Xi \gamma$ due to the large short-distance enhancement for $b\to s\gamma$ penguin transition and the large strong coupling of the anti-triplet bottom baryons with the B meson and the light baryon. These penguin-induced radiative baryonic B decay modes should be accessible by B factories.

8 pages, 1 figure. Branching ratios are corrected as previous values are too large by a factor of 2 and a new reference is added

References in corpus (3)

• Systematic approach to exclusive B ->V l^+l^-, V gamma decays
• The Radiative Decays B -> V gamma at Next-to-Leading Order in QCD
• Charmful Baryonic B Decays ${\bar{B}}^0\to {\Lambda }_c\bar{p}$ and $\bar{B}\to {\Lambda }_c\bar{p}\pi (\rho )$

Cited by in corpus (15)

• The Physics of the B Factories
• Charmless Exclusive Baryonic B Decays
• Observation of B+ to Lambda Lambdabar K+
• Observation of B0 to p Lambdabar pi-
• Charmful Three-body Baryonic B decays
• Charmless Hadronic B-Meson Decays
• Exclusive Baryonic B Decays Circa 2005
• Study of $B\to \Lambda \bar{\Lambda }K$ and $B\to \Lambda \bar{\Lambda }\pi$
• Radiative Baryonic $B$ Decays
• Study of $B\to p\bar{p}{K}^{\ast }$ and $B\to p\bar{p}\rho$
• Dipole coefficients in B -> X_s gamma in supersymmetry with large \tanβand explicit CP violation
• Penguin-induced Radiative Baryonic B Decays Revisited
• Observation of B+ to p Lambdabar pi+ pi- at Belle
• Determination of Nucleon Form factors from Baryonic B Decays
• Status of baryonic B decays