First observation of the decay Bc+ to J/psi pi+pi-pi+

Details First observation of the decay Bc+ to J/psi pi+pi-pi+ First observation of the decay Bc+ to J/psi pi+pi-pi+

2012-03-31

arxiv.org/abs/1204.0079v1

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

The decay Bc+ --> J/psi pi+pi-pi+ is observed for the first time, using 0.8 fb-1 of pp collisions at sqrt{s}=7 TeV collected by the LHCb experiment. The ratio of branching fractions BR(Bc+ --> J/psi pi+pi-pi+)/BR(B_c+ --> J/psi pi+) is measured to be 2.41+-0.30+-0.33, where the first uncertainty is statistical and the second systematic. The result is in agreement with theoretical predictions.

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