Search for the Lepton Flavour Violating Decay μ⁺ → e⁺ γ with the Full Dataset of the MEG Experiment

2016/05/17 by The MEG Collaboration
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det)

paper · doi:10.48550/arxiv.1605.05081

Abstract

The final results of the search for the lepton flavour violating decay μ⁺ → \rm e⁺ γ based on the full dataset collected by the MEG experiment at the Paul Scherrer Institut in the period 2009--2013 and totalling 7.5× 10¹⁴ stopped muons on target are presented. No significant excess of events is observed in the dataset with respect to the expected background and a new upper limit on the branching ratio of this decay of BR( μ⁺ → \rm e⁺ γ) < 4.2 × 10^-13 (90% confidence level) is established, which represents the most stringent limit on the existence of this decay to date.

Related

• New constraint on the existence of the mu+-> e+ gamma decay
• First Result From The MEG Experiment
• Lepton Flavour Violating Muon Decay at MEG
• A search for μ⁺→ e⁺γ with the first dataset of the MEG II experiment
• Status of charged lepton flavour violation search with MEG II experiment