A search for the decay μ+→e+γ, performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR(μ+→e+γ)⩽2.8×10−11 (90% C.L.). This corresponds to the measurement of positrons and photons from ∼1014 stopped μ+-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector.
A limit for the μ→eγμ→eγ decay from the MEG experiment
DUSSONI, SIMEONE;G. Gallucci;GATTI, FLAVIO;VALLE, RICCARDO;
2010-01-01
Abstract
A search for the decay μ+→e+γ, performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR(μ+→e+γ)⩽2.8×10−11 (90% C.L.). This corresponds to the measurement of positrons and photons from ∼1014 stopped μ+-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector.
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