# The MEGII detector

## TL;DR

The MEG II experiment is an upgraded detector designed to search for the forbidden decay extmu
ightarrow e extmu extgamma\ with higher precision, introducing new subdetectors and calibration methods to improve sensitivity.

## Contribution

This paper details the design, upgrades, and expected performance of the MEG II detector, advancing the search for lepton flavor violation.

## Key findings

- Enhanced detector resolution and sensitivity expected
- Introduction of novel subdetectors and calibration hardware
- Projected improved limits on extmu
ightarrow e extmu extgamma"] ,

## Abstract

We present a report of the MEG II experiment, the upgrade of MEG, whose goal is to search for the forbidden decay \megc\ with increased precision. After having briefly reviewed the motivation for such a search and the current limit due to MEG, we present the conceptual design of the detector detailing for each subdetector the motivations and the extent of the upgrade and the expected resolution improvements. Novel subdetectors and calibration hardware are introduced. We conclude with the expected sensitivity of the MEGII experiment.