Summary
This paper reports a high-precision measurement of the positive muon anomalous magnetic moment conducted at Fermilab using data from 2019–2020 accelerator runs. The result achieves 0.21 ppm precision—a 2.2-fold improvement over the previous 2018 dataset—and contributes to a refined world average when combined with Brookhaven data. The work represents a state-of-the-art experimental physics contribution but lies outside the scope of agricultural, soil health, or nutritional research.
UK applicability
This fundamental physics measurement has no direct applicability to UK agricultural systems, soil health assessment, or food-nutrition research priorities. It remains relevant only to experimental physics programmes and particle physics validation.
Key measures
Muon anomalous magnetic moment (aμ) = 116 592 057 (25) × 10⁻¹¹ (0.21 ppm); combined Fermilab result = 116 592 055 (24) × 10⁻¹¹ (0.20 ppm); world average = 116 592 059 (22) × 10⁻¹¹ (0.19 ppm)
Outcomes reported
The study measured the anomalous magnetic moment of the positive muon (aμ) using polarised muons in a storage ring, achieving a precision of 0.21 ppm. The measurement yielded a world average value when combined with Brookhaven National Laboratory data.
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