4 research outputs found
Fractionary Charged Particles Confronting Lepton Flavor Violation and the Muon's Anomalous Magnetic Moment
In light of the result published by the Fermilab Muon experiment, we
investigate a simple model that includes particles of fractional electric
charges: a colour-singlet fermion and a scalar with charges and ,
respectively. The impact of these particles on the muon anomalous magnetic
moment are examined, particularly the restrictions on their Yukawa couplings
with the light leptons. Given that lepton flavor violation processes impose
stringent constraints on certain scenarios beyond the Standard Model, we asses
the one-loop contribution of the new particles to in order to identify
regions in the parameter space consistent with the Fermilab results and
compatible with the current and projected limits on the branching ratio . Taking into account the current lower bound for the
masses of fractionary charged particles, which is around 634 GeV, we show that
the mass of the scalar particle with fractional charge must exceed 1 TeV and
may be discovered in future collider experiments. Finally, we also study the
validity of our model in light of the QCD lattice results on the muon .Comment: 14 pages, 5 figure