2007/06/30 by J.-T. Wei, J. -T. Wei, M. -Z. Wang +96 · 60 citations
Physics and Astronomy · #Collider #Helicity #High-Energy Particle Collisions Research #KEKB #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2007.11.063
published in Physics Letters B 659(1-2), 80-86 (Elsevier BV) · 15 pages, 5 figures (14 figure files), revisions to Phys. Lett. B
arxiv created 2007/10/15 · openalex publication_date 2007/12/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the characteristics of the low mass ppbar enhancements near threshold in the three-body decays B+ to p pbar K+ and B+ to p pbar pi+. We observe that the proton polar angle distributions in the ppbar helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the ppbar mass for the p pbar K+ mode. We also search for the intermediate two-body decays, B+ to pbar Delta++ and B+ to p Delta0bar, and set upper limits on their branching fractions. These results are obtained from a 414 fb-1 data sample that contains 449 times 106 BBbar events collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.