Semileptonic $B-\to p\bar{p}\ell -{\bar{\nu }}_{\ell }$ decays

Abstract

We study the four-body exclusive semileptonic baryonic $\bar{B}$ decays of $B^{-}\to p\bar{p}{\ell }^{-}{\bar{\nu }}_{\ell }$ ($\ell =e,\mu ,\tau$) in the standard model. We find that their decay branching ratios are about $(1.0,1.0,0.5)\times 10^{-4}$, respectively. In particular, the electron mode is close to the corresponding CLEO's upper limit of $5.2\times 10^{-3}$, while all results are about one or two orders of magnitude larger than the previous estimated values for the inclusive modes of $\bar{B}\to \mathbf{B}{\bar{\mathbf{B}}}^{\prime }\ell \bar{\nu }$. Clearly, both B-factories of Belle and BaBar should be able to observe these exclusive four-body modes.

10 pages, 3 figures, published version

References in corpus (12)

• Measurement of the decay $B^0\to {\pi }^{-}{\ell }^{+}\nu$ and determination of $|V_{ub}|$
• Study of the decay mechanism for B+ to p pbar K+ and B+ to p pbar pi+
• Measurement of the B^0 --> pi^-ell^+nu and B^+ --> eta^(')ell^+nu Branching Fractions, the B^0 --> pi^-ell^+nu and B^+ --> eta ell^+nu Form-Factor Shapes, and Determination of |V_{ub}|
• Charmful Three-body Baryonic B decays
• Direct CP violation in $B^{\pm }\to p\bar{p}{K}^{(\ast )\pm }$
• Angular distributions in three-body baryonic B decays
• Observation of B0 to Lambda Lambdabar K0 and B0 to Lambda Lambdabar K*0 at Belle
• Measurement of the B0 -> Lambda-bar p pi Branching Fraction and Study of the Decay Dynamics
• Study of $B\to p\bar{p}{K}^{\ast }$ and $B\to p\bar{p}\rho$
• Direct CP and T Violation in Baryonic B Decays
• Determination of Nucleon Form factors from Baryonic B Decays
• ${\eta }^{(\prime )}$ productions in semileptonic B decays

Cited by in corpus (5)

• Four-body baryonic decays of $B\to p\bar{p}{\pi }^{+}{\pi }^{-}({\pi }^{+}{K}^{-})$ and $\Lambda \bar{p}{\pi }^{+}{\pi }^{-}(K^{+}{K}^{-})$
• Three-body charmless baryonic ${\bar{B}}_s^0$ decays
• Pentaquarks in semileptonic ${\Lambda }_b$ decays
• Determination of $|V_{ub}|$ from exclusive baryonic $B$ decays
• Charmless Semileptonic B Decays at e+e- Colliders