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

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

2001-06-21

arxiv.org/abs/hep-ph/0106237v2

Phys.Rev.D65:113004,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

Added analysis of four-fermion operators. Journal version

Scientific paper

10.1103/PhysRevD.65.113004

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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