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arXiv · 2208.09917

Semileptonic baryonic $B$ decays

Yu-Kuo Hsiao
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Abstract

We study the semileptonic $B\to{\bf B\bar B'}L\bar L'$ decays with $\bf B\bar B'$ ($L\bar L'$) representing a baryon (lepton) pair. Using the new determination of the $B\to{\bf B\bar B'}$ transition form factors, we obtain ${\cal B}(B^-\to p\bar p μ^-\bar ν_μ) =(5.4\pm 2.0)\times 10^{-6}$ agreeing with the current data. Besides, ${\cal B}(B^-\to Λ\bar p ν\bar ν)=(3.5\pm 1.0)\times 10^{-8}$ is calculated to be 20 times smaller than the previous prediction. In particular, we predict ${\cal B}(\bar B^0_s\to p\bar Λe^- \bar ν_e,p\bar Λμ^- \bar ν_μ,p\bar Λτ^- \bar ν_τ) =(2.1\pm 0.6,2.1\pm 0.6,1.7\pm 1.0)\times 10^{-6}$ and ${\cal B}(\bar B^0_s\to Λ\bar Λν\bar ν)=(0.8\pm 0.2)\times 10^{-8}$, which can be accessible to the LHCb experiment.

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Yu-Kuo Hsiao. 2023-04-23. Semileptonic baryonic $B$ decays. https://doi.org/10.1140/epjc%2Fs10052-023-11489-9

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