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.). © 2012 CERN for the benefit of the LHCb collaboration.
Aaij, R., Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). First observation of the decay B+ → π+ μ+ μ-. JOURNAL OF HIGH ENERGY PHYSICS, 2012(12) [10.1007/JHEP12(2012)125].
First observation of the decay B+ → π+ μ+ μ-
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2012
Abstract
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.). © 2012 CERN for the benefit of the LHCb collaboration.
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