Measuring the anomalous precession frequency of the muon in run 2 of the Fermilab muon g-2 experiment

Schlesier, Cristina

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https://hdl.handle.net/2142/113957 Copy

Description

Title

Measuring the anomalous precession frequency of the muon in run 2 of the Fermilab muon g-2 experiment

Author(s)

Schlesier, Cristina

Issue Date

2021-11-01

Director of Research (if dissertation) or Advisor (if thesis)

Pitts, Kevin

Doctoral Committee Chair(s)

Hooberman, Ben

Committee Member(s)

• El-Khadra, Aida X
• Grosse-Perdekamp, Matthias

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• muon
• spin precession
• standard model

Abstract

The E989 Muon g −2 Experiment at Fermilab aims to measure the anomalous magnetic moment of the muon, aμ, to an unprecedented precision of 140 parts per billion (ppb). Currently, a 4.2σ discrepancy exists between the experimental value of aμ and the theoretical value given by the Standard Model. The goal of E989 is to either confirm this discrepancy and suggest new physics, or show the discrepancy to be an error. The first result from E989 has been published [1], using data collected during Run 1, which confirms the tension between theory and experiment. A total of 5 runs are planned, increasing the amount of data by roughly a factor of 10. This thesis outlines the history, motivations, and physics of the E989 experiment, and presents a preliminary analysis of data collected during Run 2. Determining aμ requires a precision measurement of two main quantities: (1) the anomalous precession frequency of muons in a magnetic storage ring and (2) the magnetic field experienced by those muons. The anomalous precession frequency, ωa must be measured with a systematic uncertainty below 70ppb in order for the collaboration to achieve its target precision. The analysis presented here concerns ωa.

Graduation Semester

2021-12

Type of Resource

Thesis

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http://hdl.handle.net/2142/113957

Copyright and License Information

Copyright 2021 Cristina Schlesier

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