Angular distributions in three-body baryonic B decays

Abstract

We study the angular distributions of the baryon-antibaryon low-mass enhancements in the three-body baryonic B decays of $B\to p\bar{p}M$ (M=K and $\pi$) in the framework of the perturbative QCD. By writing the most general forms for the transition form factors of $B\to p\bar{p}$, we find that the angular distribution asymmetry in $B^{-}\to p\bar{p}{K}^{-}$ measured by the Belle Collaboration can be explained. We give a quantitative description on the Dalitz plot asymmetry in $B^{-}\to p\bar{p}{K}^{-}$ shown by the BaBar Collaboration and demonstrate that it is equivalent to the angular asymmetry. In addition, we present our results on ${\bar{B}}^0\to p\bar{p}{K}_S$ and $B^{-}\to p\bar{p}{\pi }^{-}$ and we obtain that their angular asymmetries are $-0.35\pm 0.11$ and $0.45\pm 0.10$, respectively, which can be tested by the ongoing experiments at the B factories.

4 pages, 2 figures, version to be published in PRD

References in corpus (2)

• ppbar enhancement in B and J/Psi decay
• Exclusive Baryonic B Decays Circa 2005

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• Charmful Three-body Baryonic B decays
• Direct CP violation in $B^{\pm }\to p\bar{p}{K}^{(\ast )\pm }$
• 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
• Charmful baryonic B\to {\bf B\bar B'}M_c decays