Measurement of lepton universality parameters in B+ →k+ℓ+ℓ- and B0 →k∗0ℓ+ℓ- decays

LHCb Collaboration

Producción científica: Artículo en revista indizadaArtículorevisión exhaustiva

46 Citas (Scopus)


A simultaneous analysis of the B+→K+ℓ+ℓ- and B0→K∗0ℓ+ℓ- decays is performed to test muon-electron 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.

Idioma originalInglés
Número de artículo032002
PublicaciónPhysical Review D
EstadoPublicada - 1 ago 2023


Profundice en los temas de investigación de 'Measurement of lepton universality parameters in B+ →k+ℓ+ℓ- and B0 →k∗0ℓ+ℓ- decays'. En conjunto forman una huella única.

Citar esto