| Preprint | |
| Report number | arXiv:2405.08953 |
| Title | $b \to c l \bar{\nu}$ decays at LHCb |
| Author(s) | Chen, Chen (Marseille, CPPM) |
| Collaboration | LHCb Collaboration |
| Imprint | 2024-05-14 |
| Number of pages | 4 |
| Note | Contribution to the 2024 QCD session of the 58th Rencontres de Moriond |
| Presented at | 58th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 31 Mar - 7 Apr 2024 |
| Subject category | hep-ex ; Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; LHCb |
| Abstract | This report introduces two recent measurements of semileptonic $b$-hadron decays at the LHCb experiment, including a test of Lepton Flavour Universality (LFU) using $\bar{B}^0 \to D^{(*)+} l^- \bar{\nu}_l$ decays where $l\in{\mu,\tau}$, and a study of the $D^{*+}$ longitudinal polarisation in the $\bar{B}^0 \to D^{*+} \tau^- \bar{\nu}_\tau$ decay. With the inclusion of the new results of the LFU ratios, the world average on $R(D)$ and $R(D^*)$, still shows a tension over three standard deviations from the SM prediction, while the measured $D^{*+}$ longitudinal polarisation is compatible with the SM value. |
| Other source | Inspire |
| Copyright/License | preprint: (License: CC BY 4.0) |
Записът е създаден на 2024-05-17, последна промяна на 2024-06-09
