Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2007-04-20
Phys.Rev.D76:052004,2007
Physics
High Energy Physics
High Energy Physics - Experiment
12 pages, 5 figures (11 figure files), PRD published version
Scientific paper
10.1103/PhysRevD.76.052004
We study the charmless baryonic three-body decays of B mesons: B+ to p Lambdabar gamma, B+ to p Lambdabar pi0 and B0 to p Lambdabar pi-. The partial branching fractions as a function of the baryon-antibaryon mass and the polar angle distributions of the proton in the baryon-antibaryon system are presented. This study includes the first observation of B+ to p Lambdabar pi0, which is measured to have a branching fraction of (3.00^{+0.61}_{-0.53}\pm 0.33) times 10^{-6}. We also set upper limits on branching fractions of the two-body decays B0 to p Sigmabar^{*-}, B0 to Delta^0 Lambdabar, B+ to p Sigmabar^{*0}, and B+ to Delta^+ Lambdabar at the 90% confidence level. These results are obtained from a 414fb^{-1} data sample collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
for the Belle Collaboration
Lee Yen-Jie
Wang Zhao-Ming
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