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 36 pb-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.
Search for Lepton Number Violating Decays B^{+}→π^{-}μ^{+}μ^{+} and B^{+}→K^{-}μ^{+}μ^{+}
CARDINALE, ROBERTA;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;SANNINO, MARIO;
2012-01-01
Abstract
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 36 pb-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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