Angular distributions in three-body baryonic B decays

作者：Geng C Q^*; Hsiao Y K

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2006, 74(9): 094023.

DOI：10.1103/PhysRevD.74.094023

We study the angular distributions of the baryon-antibaryon low-mass enhancements in the three-body baryonic B decays of B -> p (p) over barM (M=K and pi) in the framework of the perturbative QCD. By writing the most general forms for the transition form factors of B -> p (p) over bar, we find that the angular distribution asymmetry in B--> p (p) over barK(-) measured by Belle Collaboration can be explained. We give a quantitative description on the Dalitz plot asymmetry in B--> p (p) over barK(-) shown by BABAR Collaboration and demonstrate that it is equivalent to the angular asymmetry. In addition, we present our results on (p) over bar (0)-> p (p) over barK(S) and B--> p (p) over bar pi(-) 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.

• 出版日期2006-11
• 单位清华大学