SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 20: Fundamental Symmetries
HK 20.4: Vortrag
Mittwoch, 1. September 2021, 18:00–18:15, H4
Frequency extraction of NMR signal to measure the magnetic field in the Fermilab Muon g−2 experiment — •Mohammad Ubaidullah Hassan Qureshi, René Reimann, and Martin Fertl for the Muon g-2 collaboration — Institute of Physics and Excellence Cluster PRISMA+, Johannes Gutenberg University Mainz, 55099 Mainz, Germany
The Fermilab Muon g−2 collaboration recently published its first result for the anomalous magnetic moment of the muon, aµ, to an unprecedented precision of 460 ppb. The new result deviates of 3.2 σ from the latest Muon g−2 Standard Model Theory Initiative prediction and combined with Brookhaven National Laboratory (BNL) result the deviation increases to 4.2 sigma. The Muon g−2 experiment determines the ratio of the muon anomalous precession frequency, wa, to the proton spin precession frequency, wp. The wp value allows us to precisely account for the magnetic field experienced by the precessing muons. In this talk I will discuss the current methodology of precisely measuring the magnetic field using nuclear magnetic resonance (NMR) probes. This is achieved by extracting the frequency of the NMR signal generated due to spin precession of hydrogen atoms in our probe. Furthermore, I will also talk through plans for upcoming Run 2/3 analysis to systematically check and improve probe frequency extraction to a value below the Run 1 uncertainty for frequency extraction.