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Technical design of the phase I Mu3e experiment

Arndt, K; Augustin, H; Baesso, P; Berger, N; Berg, F; Betancourt, C; Bortoletto, D; ... Wasili, A; + view all (2021) Technical design of the phase I Mu3e experiment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 1014 , Article 165679. 10.1016/j.nima.2021.165679. Green open access

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Abstract

The Mu3e experiment aims to find or exclude the lepton flavour violating decay μ→eee at branching fractions above 10−16. A first phase of the experiment using an existing beamline at the Paul Scherrer Institute (PSI) is designed to reach a single event sensitivity of 2⋅10−15. We present an overview of all aspects of the technical design and expected performance of the phase I Mu3e detector. The high rate of up to 108 muon decays per second and the low momenta of the decay electrons and positrons pose a unique set of challenges, which we tackle using an ultra thin tracking detector based on high-voltage monolithic active pixel sensors combined with scintillating fibres and tiles for precise timing measurements.

Type: Article
Title: Technical design of the phase I Mu3e experiment
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.nima.2021.165679
Publisher version: https://doi.org/10.1016/j.nima.2021.165679
Language: English
Additional information: © 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords: Lepton flavour violation, Muon decays, Monolithic pixel detector, Scintillating fibres, Scintillating tiles
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10134201
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