Testing the mechanism of lepton compositeness

Strict gauge invariance requires that physical left-handed leptons are actually bound states of the elementary left-handed lepton doublet and the Higgs field within the standard model. That they nonetheless behave almost like pure elementary particles is explained by the Frohlich-Morchio-Strocchi mechanism. Using lattice gauge theory, we test and confirm this mechanism for fermions. Though, due to the current inaccessibility of non-Abelian gauged Weyl fermions on the lattice, a model which contains vectorial leptons but which obeys all other relevant symmetries has been simulated.

Automated summary

Research shows that physical left-handed leptons are actually bound states of elementary left-handed lepton doublet and Higgs field, behaving almost like pure elementary particles. The Frohlich-Morchio-Strocchi mechanism has been tested and confirmed for fermions using lattice gauge theory. However, due to the current inaccessibility of non-Abelian gauged Weyl fermions on the lattice, a model containing vectorial leptons obeying relevant symmetries has been simulated.