First observation of the decay Bc+→J/ψπ +π -π +

The LHCb Collaboration

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The decay Bc+→J/ψπ +π -π + is observed for the first time, using 0.8fb -1 of pp collisions at √s=7TeV collected by the LHCb experiment. The ratio of branching fractions B(Bc+→J/ψπ +π -π +)/ B(Bc+→J/ψπ +) is measured to be 2.41±0.30±0. 33, where the first uncertainty is statistical and the second is systematic. The result is in agreement with theoretical predictions.

Original languageEnglish
Article number251802
Number of pages7
JournalPhysical Review Letters
Issue number25
Publication statusPublished - 19 Jun 2012
Externally publishedYes

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