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arXiv · 0704.2672

Study of B+ to p Lambdabar gamma, p Lambdabar pi0 and B0 to p Lambdabar pi-

M. -Z. Wang·Y. -J. Lee
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Abstract

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.

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M. -Z. Wang, Y. -J. Lee. 2007-09-26. Study of B+ to p Lambdabar gamma, p Lambdabar pi0 and B0 to p Lambdabar pi-. https://doi.org/10.1103/physrevd.76.052004

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