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.)) x 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.).

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2012). First Observation of the Decay B+ → π+ μ+ μ−. JOURNAL OF HIGH ENERGY PHYSICS, 1212(12), 125-0-125-17 [10.1007/JHEP12(2012)125].

First Observation of the Decay B+ → π+ μ+ μ−

CARBONE, ANGELO;GALLI, DOMENICO;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
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.)) x 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
R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2012). First Observation of the Decay B+ → π+ μ+ μ−. JOURNAL OF HIGH ENERGY PHYSICS, 1212(12), 125-0-125-17 [10.1007/JHEP12(2012)125].
R. Aaij; C. Abellan Beteta; A. Adametz; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/133027
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