First Result From The MEG Experiment

TL;DR

The MEG experiment's initial results search for the rare lepton flavor violating decay $^+ o e^+ $ to test physics beyond the Standard Model, with potential to discover new phenomena or constrain theoretical models.

Contribution

This paper reports the first results from the MEG experiment targeting the $^+ o e^+ $ decay, providing experimental data to explore physics beyond the Standard Model.

Findings

Initial results set new limits on the decay rate

Constraints on SUSY, GUT, and ED models

No observation of $^+ o e^+ $ decay so far

Abstract

We present the first results from the MEG experiment for the search of the Lepton Flavour Violating decay $\mu^+ \to e^+ \gamma$ . LFV decays are forbidden in the SM and highly suppressed in any minimal SM extension with tiny neutrino masses. On the other hand, several SUSY, GUT and ED models beyond the SM predict the $\mu^+ \to e^+ \gamma$ rate at a level experimentally accessible. Hence, the MEG experiment will be able either to provide an incontrovertible evidence of physics beyond the SM or to significantly constrain the parameter space of SM extensions.