New constraint on the existence of the mu+-> e+ gamma decay

2013/03/04 by MEG Collaboration, J. Adam, Adam, J. +144 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #hep-ex #physics.ins-det

paper · pdf · doi:10.48550/arxiv.1303.0754

5 pages, 3 figures, a version accepted in Phys. Rev. Lett

arxiv created 2013/04/23 · arxiv updated 2013/04/25

Abstract

The analysis of a combined data set, totaling 3.6 × 10¹4 stopped muons on target, in the search for the lepton flavour violating decay mu⁺ -> e⁺ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 × 10^-13 (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG.

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