TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
PY  - 2023
DA  - 2023//
TI  - Measurement of lepton universality parameters in B+ -> K+ l+ l- and B0 -> K0 l+ l- decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 032002
EP  - 46pp
VL  - 108
IS  - 3
PB  - Amer Physical Soc
AB  - A simultaneous analysis of the B thorn & RARR; K thorn e thorn e- and B0 & RARR; K & DBLBOND;0e thorn e- decays is performed to test muonelectron universality in two ranges of the square of the dilepton invariant mass, q2. The measurement uses a sample of beauty meson decays produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb-1. A sequence of multivariate selections and strict particle identification requirements produce a higher signal purity and a better statistical sensitivity per unit luminosity than previous LHCb lepton universality tests using the same decay modes. Residual backgrounds due to misidentified hadronic decays are studied using data and included in the fit model. Each of the four lepton universality measurements reported is either the first in the given q2 interval or supersedes previous LHCb measurements. The results are compatible with the predictions of the Standard Model.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2212.09153
UR  - https://doi.org/10.1103/PhysRevD.108.032002
DO  - 10.1103/PhysRevD.108.032002
LA  - English
N1  - WOS:001058591800001
ID  - LHCbCollaborationAaij_etal2023
ER  -