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Article Abstract
The first test of lepton flavor universality between muons and electrons using B^{+}→K^{+}π^{+}π^{-}ℓ^{+}ℓ^{-} (ℓ=e, μ) decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb^{-1}. The ratio of branching fractions between B^{+}→K^{+}π^{+}π^{-}e^{+}e^{-} and B^{+}→K^{+}π^{+}π^{-}μ^{+}μ^{-} decays is measured in the dilepton invariant-mass-squared range 1.1
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http://dx.doi.org/10.1103/PhysRevLett.134.181803 DOI Listing Publication Analysis
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Test of Lepton Flavor Universality with B^{+}→K^{+}π^{+}π^{-}ℓ^{+}ℓ^{-} Decays.
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