Search for the lepton number violating decays B+→π−μ+μ+ and B+→K−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 search is performed for the lepton number violating decay B+→h−μ+μ+, where h− represents a K− or a π−, using data from the LHCb detector corresponding to an integrated luminosity of 36pb−1. The decay is forbidden in the Standard Model but allowed in models with a Majorana neutrino. No signal is observed in either channel and limits of B(B^{+} \rightarrow K^- \mu^+ \mu^+) < 5.4\times 10^{-8} and B(B^{+} \rightarrow \pi^- \mu^+ \mu^+) < 5.8\times 10^{-8} are set at the 95% confidence level. These improve the previous best limits by factors of 40 and 30, respectively.
Original languageEnglish
Pages (from-to)101601
Number of pages1
JournalPhysical Review Letters
Early online date4 Oct 2011
Publication statusPublished - 7 Mar 2012


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