Observation of B+ -> proton Lambdabar gamma
High Energy Physics - Experiment
2019-08-14 v1
Abstract
We report the first observation of the radiative hyperonic B decay B+ -> proton Lambdabar gamma, using a 140 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured branching fraction is B(B+ -> proton Lambdabar gamma) = (2.16 ^{+0.58}_{-0.53} +- 0.20) times 10^{-6}. A search for B+ -> proton Sigmabar gamma yields no significant signal, so we set a 90% confidence-level upper limit on the branching fraction of B(B+ -> proton Sigmabar gamma) < 3.3 times 10^{-6}.
Keywords
Cite
@article{arxiv.hep-ex/0409009,
title = {Observation of B+ -> proton Lambdabar gamma},
author = {K. Abe},
journal= {arXiv preprint arXiv:hep-ex/0409009},
year = {2019}
}
Comments
12 pages, 4 figures, submitted to ICHEP2004, Beijing, China