Precision Muon-Related Observables as a Tool to Constrain New Physics Models

TL;DR

This paper introduces precision muon observables derived from LEP data to constrain new physics models, impacting theories addressing the muon g-2 anomaly and dark matter.

Contribution

It presents a novel set of muon-related observables that utilize existing precision measurements to limit new physics models.

Findings

Bounds on new physics contributions to Z -> mu+ mu- decay

Impact on models solving the muon g-2 anomaly

Constraints on dark matter candidate models

Abstract

We propose a set of precision muon-related observables that serve as a tool to constrain new physics models. Using LEP's precision measurements on the $Z$-boson pole, we derive bounds on the new physics quantum contributions to the decay $Z \to \mu^+ \mu^-$. We show that the new precision observables have a real impact on two specific models that solve the $g-2$ anomaly and provide a sound dark matter candidate.