A measurement of the ratio of branching fractions (Formula presented) in the (Formula presented), (Formula presented) decay channel is presented. This measurement uses a sample of proton-proton collision data collected at a center-of-mass energy of (Formula presented) by the CMS experiment in 2018, corresponding to an integrated luminosity of (Formula presented). The measured ratio, (Formula presented), agrees with the value of (Formula presented) predicted by the standard model, which assumes lepton flavor universality. By testing lepton flavor universality, this measurement is a probe of new physics using (Formula presented) mesons, which are currently only produced at the LHC.

Test of lepton flavor universality in semileptonic Bc+ meson decays in proton-proton collisions at s=13  TeV

Bruschini, D.;
2025

Abstract

A measurement of the ratio of branching fractions (Formula presented) in the (Formula presented), (Formula presented) decay channel is presented. This measurement uses a sample of proton-proton collision data collected at a center-of-mass energy of (Formula presented) by the CMS experiment in 2018, corresponding to an integrated luminosity of (Formula presented). The measured ratio, (Formula presented), agrees with the value of (Formula presented) predicted by the standard model, which assumes lepton flavor universality. By testing lepton flavor universality, this measurement is a probe of new physics using (Formula presented) mesons, which are currently only produced at the LHC.
2025
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
  
     https://doi.org/10.1103/PhysRevD.111.L051102
     https://dx.doi.org/10.1103/PhysRevD.111.L051102
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/154921
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