Search for lepton number violating decays B+->π-μ+μ+ and B+->K-μ+μ+
LHCb Collaboration (Including: Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Whitehead, M. (Mark) and Williams, M. P.). (2012) Search for lepton number violating decays B+->π-μ+μ+ and B+->K-μ+μ+. Physical Review Letters, Vol.108 (No.10). p. 101601. ISSN 0031-9007
WRAP_Back_Search_lepton_number.pdf - Published Version
Available under License Creative Commons Attribution.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.108.101601
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.
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