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Alignment of the straw tracking detectors for the Fermilab Muon g − 2 experiment and systematic studies for a muon electric dipole moment measurement

Lukicov, Gleb; (2020) Alignment of the straw tracking detectors for the Fermilab Muon g − 2 experiment and systematic studies for a muon electric dipole moment measurement. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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Abstract

The Fermilab Muon g−2 experiment is currently preparing for its fourth datataking period (Run-4). The experiment-wide effort on the analysis of Run-1 data is nearing completion, with the announcement of the first result expected in the coming months. The final goal of the experiment is to determine the muon magnetic anomaly, aµ = g−2 2 , to a precision of 140 ppb. This level of precision will provide indirect evidence of new physics, if the central value agrees with the previously-measured value of aµ. Essential in reducing the systematic uncertainty on aµ, through measurements of the muon beam profile, are the in-vacuum straw tracking detectors. A crucial prerequisite in obtaining accurate distributions of the beam profile is the internal alignment of the tracking detectors, which is described in this thesis. As a result of this position calibration, the tracking efficiency has increased by 3%, while the track quality increased by 4%. This thesis also discusses an additional measurement that will be made using the tracking detectors: a search for an electric dipole moment (EDM) of the muon, through the direct detection of an oscillation in the average vertical angle of the e + from the µ + decay. An observation of a muon EDM would be evidence of new physics and would provide a new source of CP violation in the charged lepton sector. Essential in measuring the EDM, as well as aµ, are accurate and precise estimations of potential non-zero radial and longitudinal magnetic fields, which were estimated using the Run-1 data. In addition, a preliminary analysis using the Run-1 data was undertaken to estimate the available precision for the aµ measurement using the tracking detectors.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: Alignment of the straw tracking detectors for the Fermilab Muon g − 2 experiment and systematic studies for a muon electric dipole moment measurement
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Copyright © The Author 2020. Original content in this thesis is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/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.
Keywords: physics.ins-det, physics.ins-det, hep-ex
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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/10116436
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