Toward the Frontiers of Particle Physics With the Muon $$g\textrm{-}2$$ Experiment

Conference · Wed Sep 16 00:00:00 EDT 2020 · No journal information

DOI:https://doi.org/10.48550/arXiv.2009.07709· OSTI ID:1682279

Valetov, Eremey ^[1]

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1. Lancaster U.

The Muon $$g\textrm{-}2$$ Experiment (E989) at Fermilab has a goal of measuring the muon anomaly ($$a_\mu$$) with unprecedented precision using positive muons. This measurement is motivated by the difference between the previous Brookhaven $$a_\mu$$ measurement and Standard Model prediction exceeding three standard deviations, which hints at the possibility of physics beyond the Standard Model. Muons are circulated in a storage ring, and the measurement requires a precise determination of the muon anomalous precession frequency (spin precession relative to momentum) from the resulting decay positron time and energy measurements collected with calorimeters. The average magnetic field seen by the muons needs to be known with high precision, and so the storage ring magnetic field is shimmed to be very uniform and is continually monitored with nuclear magnetic resonance (NMR) probes. Detailed Muon Campus beamline and muon storage ring simulations are also required for quantifying beam dynamics and spin-related systematic effects in the determination of the muon anomalous precession frequency, e.g. muon losses during the measurement window. At the time of the conference, the experiment has recently commenced Run-3, and the release of Run-1 physics results is planned for 2020.

• Research Organization: Lancaster U.
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: 89243024CSC000002; AC02-07CH11359
• OSTI ID: 1682279
• Report Number(s): FERMILAB-CONF-20-463-E; arXiv:2009.07709; oai:inspirehep.net:1817574
• Resource Type: Conference paper
• Conference Information: Journal Name: No journal information
• Country of Publication: United States
• Language: English

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