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arXiv · hep-ph/0106237

Electromagnetic suppression of the decay mu --> e+gamma

Andrzej Czarnecki·Ernest Jankowski
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Abstract

Due to large QED anomalous dimensions of the electric and magnetic dipole operators, the rate of the rare muon decay mu --> e+gamma is suppressed by the factor [ 1- 8 alpha/pi ln(Lambda/m_mu) ], independent of the physics responsible for the lepton-flavor violation, except for the scale Lambda at which it occurs. For Lambda = 100 -- 1000 GeV, the resulting decrease of the rate amounts to about 12 -- 17 %.

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Andrzej Czarnecki, Ernest Jankowski. 2002-10-05. Electromagnetic suppression of the decay mu --> e+gamma. https://doi.org/10.1103/physrevd.65.113004

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