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. |