# Instrumentation for Colliding Beam Physics (INSTR-17)

from 27 February 2017 to 3 March 2017
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone
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# Contribution Contributed Oral

Tracking and vertex detectors

# Status of the Mu3e detector

## Speakers

• Dr. Dirk WIEDNER

## Content

Mu3e is an experiment searching for charged lepton flavor violation in the rare decay $mu rightarrow$ eee. Decay vertex position, decay time and particle momenta have to be precisely measured in order to reject both combinatorial and physics background. A silicon pixel tracker based on 50 $mu$m thin high voltage monolithic active pixel sensors (HV-MAPS) in a 1T magnetic field will deliver precise vertex and momentum information. A scintillating fibre detector and a scintillating tile detector will provide sub ns time information. The status of the Mu3e detector will be presented, summarizing the development of HV-MAPS chips, the pixel detector modules and the timing detectors as well as the front-end electronics.

## Summary

Mu3e is an experiment searching for charged lepton flavor violation in the rare decay $mu rightarrow$ eee with a sensitivity goal of $10^{-16}$. Decay vertex position, decay time and particle momenta have to be precisely measured in order to reject both combinatorial and physics background. A silicon pixel tracker based on 50 $mu$m thin high voltage monolithic active pixel sensors (HV-MAPS) on ultra-thin support structures in a 1T magnetic field will deliver precise vertex and momentum information. A scintillating fibre detector and a scintillating tile detector will provide sub ns time information. The status of the Mu3e detector will be presented. The development of HV-MAPS chip prototypes will be discussed, highlighting results from the characterization at test-beam campaigns. The current status of pixel detector modules with emphasis on performance of the novel aluminum based flex-prints will be presented. The performance of the timing detector prototypes as well as the front-end electronics will be covered.