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CMS Note
Report number CMS-CR-2024-325
Title Measurements of lepton flavour universality in $B_c^+$ meson decays
Author(s) Sedelnikov, Aleksandr (CERN-based)
Publication 2024
Collaboration CMS Collaboration
Imprint 22 Nov 2024
Number of pages 10
Presented at 7th International Conference on Particle Physics and Astrophysics, Moscow, Russia, 22 - 25 Oct 2024
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN LHC ; CMS
Keywords General
Abstract The CMS experiment results on R($J/\psi$) = $\mathcal{B}(B_c^+ \to J/\psi \tau^+ \nu_{\tau})/\mathcal{B}(B_c^+ \to J/\psi \mu^+ \nu_{\mu})$ lepton flavor universality observable are reported using two channels of reconstruction of the $\tau$ lepton: $\tau^+ \rightarrow \mu^+ \nu_\mu \bar{\nu_\tau}$ (leptonic) and $\tau^+ \to \pi^+ \pi^- \pi^+ (+ \pi^0) \bar{\nu_{\tau}}$ (hadronic). These measurements use 13 TeV proton-proton collision data from the LHC Run 2. The results are consistent with the predictions of the Standard Model.

 


 Datensatz erzeugt am 2024-12-10, letzte Änderung am 2024-12-10


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