Angular distributions in three-body baryonic B decays

2006/06/30 by C. Q. Geng, Y. K. Hsiao · 1 citation
Physics and Astronomy · #hep-ph #hep-ex

paper · pdf · doi:10.1103/physrevd.74.094023

published as Phys.Rev.D74:094023,2006 · 4 pages, 2 figures, version to be published in PRD

arxiv created 2006/11/10 · arxiv updated 2009/12/01

Abstract

We study the angular distributions of the baryon-antibaryon low-mass enhancements in the three-body baryonic B decays of B→ ppM (M=K and π) in the framework of the perturbative QCD. By writing the most general forms for the transition form factors of B→ pp, we find that the angular distribution asymmetry in B^-→ ppK^- measured by the Belle Collaboration can be explained. We give a quantitative description on the Dalitz plot asymmetry in B^-→ ppK^- shown by the BaBar Collaboration and demonstrate that it is equivalent to the angular asymmetry. In addition, we present our results on B⁰→ ppK_S and B^-→ ppπ^- and we obtain that their angular asymmetries are -0.35±0.11 and 0.45±0.10, respectively, which can be tested by the ongoing experiments at the B factories.

Cited by

• Observation of the decay B⁰_s→ K⁰ p p and measurement of the B⁰_(s) → K⁰ p p branching fractions