Technical design of the phase I Mu3e experiment

作者：K. Arndt, Heiko Augustin, P. Baesso, N. Berger, F. Berg, C. Betancourt, D. Bortoletto, A. Bravar, Konrad Briggl, Dorothea Vom Bruch, A. Buonaura, F. Cadoux, C. Chavez Barajas, H. Chen, K. Clark, P. Cooke, S. Corrodi, A. Damyanova, Y. Demets, S. J. Dittmeier, P. Eckert, F. Ehrler, D. Fahrni, S. Gagneur, L. Gerritzen, J. Goldstein, Dirk Gottschalk, C. Grab, R. Gredig, AM Groves, J. Hammerich, U. Hartenstein, U. Hartmann, H. S. Hayward, A. Herkert, G. G. Hesketh, S. Hetzel, M. Hildebrandt, Z. Hodge, A. Höfer, Qinhua Huang, S. M. Hughes, Lennart Huth, David Maximilian Immig, T.J. Jones, M. Jones, Hans-Christian Kästli, M. Köppel, P.-R. Kettle, M. Kiehn, S. Kilani, Hannah Klingenmeyer, A. Knecht, A. Knight, B. Kotliński, A. Kozlinskiy, Richard Leys, G. J. Lockwood, A. Loreti, D. La Marra, M. Müller, Beat H. Meier, F. Meier Aeschbacher, A. Meneses, Kaloyan Metodiev, A. Mtchedlishvili, Sachin V. Muley, Y. Munwes, L.O.S. Noehte, P. Owen, A. Papa, I. Paraskevas, I‎. ‎Perić, A.-K. Perrevoort, R. Plackett, M. Pohl, S. Ritt, P. Robmann, N. Rompotis, T. Rudzki, G. Rutar, A. Schöning, R. Schimassek, H.-C. Schultz-Coulon, N. Serra, Wei Shen, I. P. J. Shipsey, S. Shrestha, O. Steinkamp, A. Stoykov, U. Straumann, S. Streuli, Kevin Stumpf, N. Tata, J. J. Velthuis, L. Vigani, E. Vilella Figueras, J. H. Vossebeld, R. Wallny, A. Wasili, Frederik Waûters, A. Weber, D. Wiedner, B. Windelband, Tiancheng Zhong · 发表于：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · 年份：2021 · DOI：10.1016/j.nima.2021.165679 · 被引用次数：118 · 研究领域：Particle Detector Development and Performance、Radiation Detection and Scintillator Technologies、Particle physics theoretical and experimental studies

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.