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arXiv · hep-ph/0210275

Hadronic B Decays to Charmed Baryons

Hai-Yang Cheng·Kwei-Chou Yang
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Abstract

We study exclusive B decays to final states containing a charmed baryon within the pole model framework. Since the strong coupling for $Λ_b\bar B N$ is larger than that for $Σ_b \bar BN$, the two-body charmful decay $B^-\toΣ_c^0\bar p$ has a rate larger than $\bar B^0\toΛ_c^+\bar p$ as the former proceeds via the $Λ_b$ pole while the latter via the $Σ_b$ pole. By the same token, the three-body decay $\bar B^0\toΣ_c^{++}\bar pπ^-$ receives less baryon-pole contribution than $B^-\toΛ_c^+\bar pπ^-$. However, because the important charmed-meson pole diagrams contribute constructively to the former and destructively to the latter, $Σ_c^{++}\bar pπ^-$ has a rate slightly larger than $Λ_c^+\bar pπ^-$. It is found that one quarter of the $B^-\to Λ_c^+\bar pπ^-$ rate comes from the resonant contributions. We discuss the decays $\bar B^0\toΣ_c^0\bar pπ^+$ and $B^-\toΣ_c^0\bar pπ^0$ and stress that they are not color suppressed even though they can only proceed via an internal W emission.

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Hai-Yang Cheng, Kwei-Chou Yang. 2002-10-21. Hadronic B Decays to Charmed Baryons. https://doi.org/10.1103/physrevd.67.034008

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