%0 Journal Article
%T Search for Lepton-Universality Violation in B+ -> K(+)l(+)l(-) Decays
%A LHCb Collaboration (Aaij, R. et al
%A Garcia Martin, L. M.
%A Henry, L.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanchez Mayordomo, C.
%J Physical Review Letters
%D 2019
%V 122
%N 19
%I Amer Physical Soc
%@ 0031-9007
%G English
%F LHCbCollaborationAaij_etal2019
%O WOS:000468227800003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4014), last updated on Sat, 01 Jun 2019 11:34:29 +0000
%X A measurement of the ratio of branching fractions of the decays B+ -> K+mu(+)mu(-) and B+ -> K(+)e(+)e(-) is presented. The proton-proton collision data used correspond to an integrated luminosity of 5.0 fb(-1) recorded with the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. For the dilepton mass-squared range 1.1 < q(2) < 6.0 GeV2/c(4) the ratio of branching fractions is measured to be R-K = 0.846(-0.054-0.014)(+0.060+0.016), where the first uncertainty is statistical and the second systematic. This is the most precise measurement of R-K to date and is compatible with the standard model at the level of 2.5 standard deviations.
%R 10.1103/PhysRevLett.122.191801
%U https://arxiv.org/abs/1903.09252
%U https://doi.org/10.1103/PhysRevLett.122.191801
%P 191801 - 13pp