Cotrozzi, L. and Donati, S. and Murat, P. (2024) Measurement of the anomalous spin precession frequency ωa in the Muon mthg−2 experiment at Fermilab. Il nuovo cimento C, 47 (5). pp. 1-4. ISSN 1826-9885
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Abstract
The muon magnetic anomaly aμ =(gμ −2)/2 is a low-energy ob servable, which can be both measured and computed to high precision, making it a sensitive test of the Standard Model (SM). In April 2021, the E989 Collaboration at Fermilab National Accelerator Laboratory (FNAL) published the first result based on the first year of data taking (Run-1), and in August 2023 a new result was published based on two more years of data taking (Run-2 and Run-3). The new result was in agreement with the first one and with the previous experiment at Brookhaven National Laboratory (BNL), and the combination of these results brought the uncertainty on the experimental measurement of aμ to the unprecedented value of 0.19 parts per million (ppm). This paper will present details about the improvements and upgrades since the 2021 result, and it will describe the final statistical and systematic sources of uncertainty on ωa in the 2023 result.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 09 Dec 2024 14:20 |
| Last Modified: | 09 Dec 2024 14:20 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23293 |
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