Abstract
Presented are the preliminary results of a search for the lepton-flavour violating decay μ→ eγ by the MEG experiment at the Paul Scherrer Institut in Switzerland. These results are based on data taken during a two months period in 2009 and amount to some 6·1013 muon decays in the detector. Using a blind likelihood analysis technique a sensitivity of 6.1·10-12 on the branching ratio is achieved with a preliminary upper limit on the branching ratio set at 1.5·10-11 at a 90% confidence level.
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