New limit on the lepton-flavour violating decay mu -> e gamma
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. Galli,, G. Gallucci, F. Gatti, B. Golden, M. Grassi
TL;DR
This paper reports a new, more stringent upper limit on the branching ratio of the lepton-flavour violating decay mu -> e gamma, based on analysis of data from the MEG detector collected in 2009 and 2010.
Contribution
It provides the most stringent upper limit to date on mu -> e gamma decay, improving constraints on lepton-flavour violation models.
Findings
90% C.L. upper limit of 2.4 x 10^-12 on the branching ratio
Analyzed 1.8 x 10^14 muon decays
Used likelihood analysis of combined data sample
Abstract
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 flavour violating decay mu->e gamma. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8 x 10**14 muon decays, gives a 90% C.L. upper limit of 2.4 x 10**-12 on the branching ratio of the mu->e gamma decay, constituting the most stringent limit on the existence of this decay to date.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.