Lepton flavour universality violation from composite muons

الأصل · EN

We describe a possibility to explain the 2.6σ deviation from lepton flavour universality observed by the LHCb collaboration in B+→ K+ℓ+ℓ- decays in the context of minimal composite Higgs models. We find that a sizable degree of compositeness of partially composite muons can lead to a good agreement with the experimental data. Our construction predicts a new physics contribution to Bₛ-Bₛ mixing. Additionally, it accounts for the deficit in the invisible Z width measured at LEP.