PoS - Proceedings of Science
Volume 445 - 21st Conference on Flavor Physics and CP Violation (FPCP2023) - Parallel session A
Tests of Lepton Flavour Universality and searches for Lepton Flavour Violation at LHCb
S. Schmitt
Full text: pdf
Pre-published on: September 29, 2023
Published on: November 14, 2023
Rare $b$-hadron decays serve as powerful probes for investigating Lepton Flavour Universality (LFU) and Lepton flavour violation. These decays, mediated through $b\to s\ell\ell$ transitions, allow for stringent tests of LFU, a fundamental symmetry of the Standard Model (SM) that assumes the universal coupling of electroweak gauge bosons to leptons. However, presence of New Physics beyond the SM can manifest in sizeable deviations from LFU.

These proceedings present a summary of recent measurements focused on branching ratios of $B\to K^{(\ast)}\ell^{(\prime)+}\ell^-$ and $B_s^0\to \phi \ell^{\prime +}\ell^-$ decays, with $\ell = e, \mu$, performed at LHCb.
The experimental techniques employed by LHCb are described, including the reconstruction and identification of the final-state particles, event selection criteria, and the estimation of systematic uncertainties. The discussed measurements constitute the most precise tests of LFU in $b \to s\ell\ell$ transitions to date and are compatible with the SM predictions.
DOI: https://doi.org/10.22323/1.445.0051
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.