Search for lepton number violating decays B +→π -μ +μ + and B +→K -μ +μ +

Journal article

A search is performed for the lepton number violating decay B +→h -μ +μ +, where h - represents a K - or a π -, using an integrated luminosity of 36pb -1 of data collected with the LHCb detector. 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 +→K -μ +μ +)<5. 4×10 -8 and B(B +→π -μ +μ +)<5.8×10 -8 are set at the 95% confidence level. These improve the previous best limits by factors of 40 and 30, respectively. © 2012 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Authors: Aaij, R; Abellan Beteta, C; Adeva, B; Adinolfi, M; Adrover, C

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 108
• Issue: 10
• Publication date: 2012-03-07
• DOI: 10.1103/PhysRevLett.108.101601
• EISSN: 1079-7114
• ISSN: 0031-9007