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 ; the second is systematic. The result is in agreement with theoretical predictions. © 2012 CERN.
First observation of the decay Bc+→J/ψπ +π -π +
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2012-01-01
Abstract
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 ; the second is systematic. The result is in agreement with theoretical predictions. © 2012 CERN.File in questo prodotto:
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