First observation of the decay B(c)+ → J/ψπ(+) π- π+
- PMID: 23004586
- DOI: 10.1103/PhysRevLett.108.251802
First observation of the decay B(c)+ → J/ψπ(+) π- π+
Abstract
The decay B(c)(+) → J/ψπ(+) π(-) π(+) 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 B(B(c)(+) → J/ψπ(+) π(-) π(+))/B(B(c)(+)→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.
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