Lepton Flavour Universality tests and Lepton Flavour Violation searches at LHCb

TL;DR

This paper reviews tests of Lepton Flavour Universality and searches for Lepton Flavour Violation at LHCb, highlighting recent experimental hints of deviations from the Standard Model and discussing future prospects with upgraded detectors.

Contribution

It provides a comprehensive review of recent LHCb results on LFU tests and LFV searches, including potential deviations and future experimental plans.

Findings

Hints of deviations from LFU observed in B decays

Searches for lepton flavour violating processes conducted

Prospects for future measurements with upgraded LHCb

Abstract

The Standard Model (SM) of particle physics represents our most fundamental knowledge of elementary particles and their interactions. One of the cardinal properties of the SM which has been thoroughly studied during the past years is the so-called Lepton Flavour Universality (LFU): W and Z bosons are predicted to be equally coupled to the three lepton generations. Hints for deviations from LFU have been found by the LHCb collaboration in $b\to s\ell\ell$ and $b\to c\ell\nu$ decays, sparking great interest and further motivating the searches for lepton flavour violating processes. A general review of these results is presented, including prospects in view of the LHC and LHCb upgrade.