| 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. |
Record creato 2024-12-10, modificato l'ultima volta il 2024-12-10