TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2019
DA  - 2019//
TI  - Search for Lepton-Universality Violation in B+ -> K(+)l(+)l(-) Decays
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 191801 - 13pp
VL  - 122
IS  - 19
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - https://arxiv.org/abs/1903.09252
UR  - https://doi.org/10.1103/PhysRevLett.122.191801
DO  - 10.1103/PhysRevLett.122.191801
LA  - English
N1  - WOS:000468227800003
ID  - LHCbCollaborationAaij_etal2019
ER  -