Research Proposal for an Experiment to Search for the Decay {\mu} -> eee

TL;DR

This paper proposes the Mu3e experiment to search for the rare mu+ -> e+e-e+ decay with unprecedented sensitivity, utilizing advanced silicon pixel detectors and scintillating fiber hodoscopes.

Contribution

Introduction of a novel experimental setup (Mu3e) achieving significantly improved sensitivity for detecting lepton flavor violation in muon decays.

Findings

Projected sensitivity of 10^-16 for mu+ -> e+e-e+ decay

Use of modern silicon pixel detectors for high spatial resolution

Implementation of scintillating fibers and tiles for precise timing

Abstract

We propose an experiment (Mu3e) to search for the lepton flavour violating decay mu+ -> e+e-e+. We aim for an ultimate sensitivity of one in 10^16 mu-decays, four orders of magnitude better than previous searches. This sensitivity is made possible by exploiting modern silicon pixel detectors providing high spatial resolution and hodoscopes using scintillating fibres and tiles providing precise timing information at high particle rates.