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Preparations for the Mu3e experiment: Magnet commissioning, beamline studies and a study of fake tracks

Paraskevas, Ioannis; (2022) Preparations for the Mu3e experiment: Magnet commissioning, beamline studies and a study of fake tracks. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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Abstract

The Mu3e experiment at the Paul Scherrer Institute in Switzerland will search for the rare decay of a positive muon to two positrons and one electron. Phase I of the experiment aims for a sensitivity of one in 10^15 muon decays and Phase II aims for a sensitivity of one in 10^16 muon decays which is four orders of magnitude better that previous experiments. The Standard Model process via a neutrino loop is suppressed to unobservable levels O(< 10^50) and does not play a practical role. Therefore, any measurement of this decay would be a clear sign of new physics. To achieve its goal, Mu3e relies on a high rate of muons being detected in a spectrometer with a wide kinematic acceptance, excellent momentum and vertex resolutions and precise timing information. As of September 2021, data taking is expected to begin in 2022 at a muon rate of 10^8 μ/s. The full rate of 2x10^9 μ/s will not be reached before 2026. The main subject of this thesis is the preparations for the experiment which include the magnet commissioning, a magnet simulation, beamline simulation studies, beam measurements at the πE5 beamline and an analysis of fake tracks in simulation.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: Preparations for the Mu3e experiment: Magnet commissioning, beamline studies and a study of fake tracks
Event: UCL (University College London)
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Copyright © The Author 2021. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request.
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/10142359
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