New limit on the lepton-flavor-violating decay &lt;em&gt;μ&lt;sup&gt;+&lt;/sup&gt; → e&lt;sup&gt;+&lt;/sup&gt;γ&lt;/em&gt;

Adam, J.; Bai, X.; Baldini, A.M.; Baracchini, E.; Bemporad, C.; Boca, G.; Cattaneo, P.W.; Cavoto, G.; Cei, F.; Cerri, C.; Egger, J.; Hildebrandt, M.; Kettle, P.R.; Kiselev, O.; Natori, H.; Papa, A.; Renga, F.; Ritt, S.; Rossella, M.; Uchiyama, Y.; Zanello, D.

doi:10.1103/PhysRevLett.107.171801

New limit on the lepton-flavor-violating decay μ⁺ → e⁺γ

Adam J, Bai X, Baldini AM, Baracchini E, Bemporad C, Boca G, Cattaneo PW, Cavoto G, Cei F, Cerri C, Egger J, Hildebrandt M, Kettle PR, Kiselev O, Natori H, Papa A, Renga F, Ritt S, Rossella M, Uchiyama Y, Zanello D, et al.

Citation

Adam, J., Bai, X., Baldini, A. M., Baracchini, E., Bemporad, C., Boca, G., … Zanello, D. (2011). New limit on the lepton-flavor-violating decay μ⁺ → e⁺γ. Physical Review Letters, 107(17), 171801 (5 pp.). https://doi.org/10.1103/PhysRevLett.107.171801

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:14240

We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton-flavor-violating decay μ⁺ → e⁺γ. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8 x 10¹⁴muon decays, gives a 90% C.L. upper limit of 2.4 x 10^-12 on the branching ratio of the μ⁺ → e⁺γ decay, constituting the most stringent limit on the existence of this decay to date.