# Astroparticle Physics - A Joint TeVPA/ IDM Conference

23-28 June 2014
Amsterdam
Europe/Zurich timezone

## The MEG experiment: past, present and future

23 Jun 2014, 16:30
15m
Room 3 (Tuschinski Theatre)

### Room 3

#### Tuschinski Theatre

Presentation Particle Physics

### Speaker

Mrs Elisabetta Baracchini (The University of Tokyo)

### Description

We will present the latest result from the MEG experiment, based on the data collected at the Paul Scherrer Institut (PSI), in search of the Lepton Flavour Violating (LFV) decay $\mu^+ \to e^+ \gamma$. Such decay is forbidden within the Standard Model (SM), nevertheless most of its viable extensions predict a branching ratio in the 10$^{−14}$ to 10$^{−12}$ range. An observation of the $\mu^+ \to e^+ \gamma$ decay would therefore represent an unambiguous sign of New Physics (NP) beyond the SM, whereas a tight upper limit significantly constraints the parameter space of NP scenarios, in a way complementary to high energy colliders measurements. With the analysis of the data collected in the years 2009-2011, we set the most stringent upper limit to date on charged LFV processes with BR ($\mu^+ \to e^+ \gamma$) < 5.7 × 10$^{−13}$ at 90% confidence level. The MEG collaboration is working on a detector upgrade, MEG II, whose design and associated research and development projects will be illustrated as well.

### Primary author

Mrs Elisabetta Baracchini (The University of Tokyo)

 Slides