First observation of the decay B+→π+μ+μ−

The LHCb Collaboration, Matthew Needham, Franz Muheim, Peter Clarke, Yuehong Xie, Stephan Eisenhardt

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A discovery of the rare decay B+→π+μ+μ− is presented. This decay is observed for the first time, with 5.2 σ significance. The observation is made using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector. The measured branching fraction is (2.3 ± 0.6 (stat.) ± 0.1 (syst.))×10−8, and the ratio of the B+→π+μ+μ− and B+→K+μ+μ− branching fractions is measured to be 0.053 ± 0.014 (stat.) ± 0.001 (syst.).
Original languageUndefined/Unknown
Pages (from-to)125
Number of pages1
JournalJournal of High Energy Physics
Early online date9 Oct 2012
Publication statusPublished - Dec 2012

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