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20 April 2024

» arxiv » 1303.0754

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New constraint on the existence of the mu+-> e+ gamma decay
MEG Collaboration ; J. Adam ; X. Bai ; A. M. Baldini ; E. Baracchini ; C. Bemporad ; G. Boca ; P. W. Cattaneo ; G. Cavoto ; F. Cei ; C. Cerri ; A. de Bari ; M. De Gerone ; T. Doke ; S. Dussoni ; J. Egger ; K. Fratini ; Y. Fujii ; L. Gallia ; G. Gallucci ; F. Gatti ; B. Golden ; M. Grassi ; A. Graziosi ; D. N. Grigoriev ; T. Haruyama ; M. Hildebrandt ; Y. Hisamatsu ; F. Ignatov ; T. Iwamoto ; D. Kaneko ; P.-R. Kettle ; B. I. Khazin ; N. Khomotov ; O. Kiselev ; A. Korenchenko ; N. Kravchuk ; G. Lim ; A. Maki ; S. Mihara ; W. Molzon ; T. Mori ; D. Mzavia ; R. Nardo ; H. Natori ; D. Nicolo ; H. Nishiguchi ; Y. Nishimura ; W. Ootani ; M. Panareo ; A. Papa ; R. Pazzi ; G. Piredda ; A. Popov ; F. Renga ; E. Ripiccini ; S. Ritt ; M. Rossella ; R. Sawada ; F. Sergiampietri ; G. Signorelli ; S. Suzuki ; F. Tenchini ; C. Topchyan ; Y. Uchiyama ; R. Valle ; C. Voena ; F. Xiao ; S. Yamada ; A. Yamamoto ; S. Yamashita ; Z. You ; Yu. V. Yudin ; D. Zanello ;
Date:	4 Mar 2013
Abstract:	The analysis of a combined data set, totaling 3.6 imes 10^14 stopped muons on target, in the search for the lepton flavour violating decay mu+ -> e+ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 imes 10^-13 (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG.
Source:	arXiv, 1303.0754
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