
TL;DR
This paper reports new results from the MEG experiment searching for the ultra-rare muon decay $ o e mma$, setting an upper limit on its branching ratio based on 2009 data, contributing to understanding lepton flavor violation.
Contribution
The paper presents the latest upper limit on the branching ratio of $ o e mma$ from the MEG experiment, using a large dataset from 2009, advancing the search for new physics.
Findings
Upper limit on BF($ o e mma$) < 1.5 x 10^{-11} at 90 ext{C.L.}
Data corresponds to approximately 6.5 x 10^{13} muons
Preliminary results from the 2009 dataset
Abstract
New results of a search for the ultra-rare decay by the MEG collaboration are reported in this contribution. The data were taken during 2009 and correspond to approximately 6.5 10 muon stopped on target. A maximum likelihood analysis sets an upper limit at 90\% C.L. on the branching ratio, BF() 1.5 10. The results presented here are preliminary.
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