Muon g − 2 anomaly and non-locality

Triangle Anomaly and the Muon G − 2 *

The subject of this paper is a class of two-loop electroweak contributions to the muon g−2 containing a fermion triangle along with a virtual photon and Z boson, as shown in Fig. 1. In the standard model all charged fermions contribute to the triangle loop. Individual contributions of fermions lighter than the Z boson are enhanced by large logarithms ln(MZ/m), where m denotes the mass of the fe...

An anomaly of non-locality

Muon ( g − 2 )

For a spin1 2 particle, ~ S = ~2~σ, and gs is called the Lande g-factor. From classical calculations that treat the charged particle as a rotating piece of current, gs = 1. Surprisingly, the Dirac equation in relativistic quantum mechanics predicts that gs = 2, a result which agreed with the crude experiments of the time. In the 1940’s, a new understanding of renormalization in the developing q...

The muon (g - 2) anomaly and a new light vector boson

This mini review aims to outline the main experimental and theoretical results related with the search for a new light vector boson proposed as a solution of the muon g− 2 anomaly. Additionally, I consider a model with infinite number of light vector bosons which can explain the anomaly, while still remaining consistent with current experimental bounds. 1 ar X iv :1 70 2. 04 59 6v 1 [ he pph ] ...

Nearly Bi-Maximal Neutrino Mixing, Muon g-2 Anomaly and Lepton-Flavor-Violating Processes

We interpret the newly observed muon g-2 anomaly in the framework of a leptonic Higgs doublet model with nearly degenerate neutrino masses and nearly bi-maximal neutrino mixing. Useful constraints are obtained on the rates of lepton-flavor-violating rare decays τ → μγ, μ → eγ and τ → eγ as well as the μ-e conversion ratio Rμe. We find that Γ(μ → eγ), Γ(τ → eγ) and Rμe depend crucially on possib...