Summary
This paper reports a precision measurement of the positive muon magnetic anomaly from the Fermilab Muon g-2 Experiment, achieving an uncertainty of 0.20 ppm by analysing over 4 times more positron decay data than previous 2018 measurements and substantially reducing systematic errors through improved beam stability and magnetic field characterisation. When combined with prior results, the new experimental world average for the muon anomaly is aμ(exp) = 116 592 059(22)×10⁻¹¹ (0.19 ppm), representing a factor of 2 improvement in precision relative to earlier measurements.
UK applicability
This is a fundamental particle physics measurement conducted at Fermilab in the United States and has no direct applicability to UK agricultural systems, soil health, nutrient density or farming practices. It falls outside the scope of Vitagri's Pulse Brain research portfolio.
Key measures
Positive muon magnetic anomaly aμ = 116 592 055(24)×10⁻¹¹ (0.20 ppm); anomalous precession frequency ωₐ; magnetic field distribution ω̃ₚ′; ratio ωₐ/ω̃ₚ′
Outcomes reported
The study measured the positive muon magnetic anomaly (aμ) to a precision of 0.20 ppm using data from the Fermilab Muon g-2 Experiment collected in 2019 and 2020, achieving a factor of 2 improvement in systematic error and precision over previous measurements.
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