Status and perspectives of the MEG experiment.

We present the status and the perspectives of the MEG experiment which has been searching for the Lepton Flavour Violating decay μ+ → e+ γ for several years. In a dataset corresponding to 3.6 x 1014 positive muons stopped on target we didn't find any evidence for this decay and established an upper bound on the μ+ → e+ γ branching ratio of 5.7 x 10-13 at 90% C.L., with a sensitivity of 7.7 x 10-13, which improves our world best limit by a factor of 4 and the best previous limit by a factor of 20. Our final dataset is about twice as large than the analyzed sample and the expected final sensitivity of the experiment is ~ 5 x 10-13. We also discuss the status of the upgrade of the experiment (MEGII) which aims to improve the sensitivity by a further order of magnitude. [ABSTRACT FROM AUTHOR]