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arxiv: 1605.05081 · v3 · submitted 2016-05-17 · ✦ hep-ex · physics.ins-det

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

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classification ✦ hep-ex physics.ins-det
keywords decaydatasetgammaexperimentflavourfullleptonlimit
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The final results of the search for the lepton flavour violating decay $\mu^{+} \rightarrow {\rm e^{+}} \gamma$ based on the full dataset collected by the MEG experiment at the Paul Scherrer Institut in the period 2009--2013 and totalling $7.5\times 10^{14}$ 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 $BR( \mu^{+} \rightarrow {\rm e^{+}} \gamma ) < 4.2 \times 10^{-13}$ (90\%\ confidence level) is established, which represents the most stringent limit on the existence of this decay to date.

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