articlePhysical Review LettersOct 6, 2014LVHYBRID OA

Test of Lepton Universality Using B + → K + ℓ + ℓ − Decays

National Institute for Subatomic Physics · Universidade de Santiago de Compostela · +71 more institutions

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Abstract

A measurement of the ratio of the branching fractions of the B(+) → K(+)μ(+)μ(-) and B(+) → K(+)e(+)e(-) decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb(-1), recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1

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