Technical design of the phase I Mu3e experiment

Arndt, K, Augustin, H, Baesso, P, Berger, N, Berg, F, Betancourt, C, Bortoletto, D, Bravar, A, Briggl, K, vom Bruch, D
et al (show 95 more authors) (2021) Technical design of the phase I Mu3e experiment. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1014. 2021-.

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The Mu3e experiment aims to find or exclude the lepton flavour violating decay $\mu \rightarrow eee$ 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 $2\cdot 10^{-15}$. 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 $10^{8}$ 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.

Item Type: Article
Additional Information: 117 pages. Minor corrections to the author list. Replaced with published version. Editor: Frank Meier Aeschbacher
Uncontrolled Keywords: Lepton flavour violation, Muon decays, Monolithic pixel detector, Scintillating fibres, Scintillating tiles
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 09 Aug 2021 08:02
Last Modified: 18 Jan 2023 23:02
DOI: 10.1016/j.nima.2021.165679
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