Séminaire: the MEG Experiment (mu --> e gamma) at PSI and its upgrade

par Dr Angela PAPA (PSI (Paul Scherrer Institute), Switzerland)

vendredi 24 oct. 2014, 10:30 → 11:30 Europe/Paris

Amphi 125 (Dept.Phys.)

The MEG experiment searches for the (mu+ --> e+ gamma) decay and has recently set the most stringent upper limit on its branching ratio B (mu+ --> e+ gamma) < 5.7*10^-13 at 90% C.L., using the 2009-2011 data sample. It is a factor 20 better than the previous limit set by the MEGA experiment and also the strongest upper limit among all the other particle decays. The sample statistic has been increased by a factor two adding the 2012-2013 data sample to the previous one and the analysis is ongoing. We reached the planned sensitivity, whose limit comes from the accidental background. The strong scientific motivation of searching for charged Lepton Flavor Violation (cLFV) pushed the collaboration to think about an upgrade of the experiment, aiming at enhancing the sensitivity by a factor 10. The current status and the upgrade program of the experiment will be presented.

Slides Papa_Clermont2014.pdf