Lepton Flavour Universality tests in $b \to c l \nu$ decays at LHCb

TL;DR

This paper discusses recent tests of lepton flavor universality in semileptonic B decays at LHCb, exploring potential signs of new physics suggested by deviations in decay rates involving taus versus muons.

Contribution

It presents new experimental tests of lepton flavor universality in $b o c l u$ decays at LHCb, contributing to the search for physics beyond the Standard Model.

Findings

Hints of deviations from Standard Model predictions in tau vs muon decay rates

Two recent lepton universality tests at LHCb are reported

Results could indicate potential signs of new physics

Abstract

The Standard Model predicts that the electroweak couplings to the three charged leptons are identical. However, in the last decade, experimental measurements have suggested that semileptonic processes involving taus could have a slightly enhanced decay rate compared to their muonic counterparts. If confirmed, this would be an unambiguous sign of New Physics, with various scenarios introducing additional interactions that couple preferentially to the third generation. Two recent lepton universality tests performed at LHCb are presented in this proceedings of the first edition of the New Frontiers in Lepton Flavour workshop.