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

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)251802
Number of pages1
JournalPhysical Review Letters
Early online date31 Mar 2012
Publication statusPublished - 2012


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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