Standard

Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm. / The Muon g-2 Collaboration.

In: Physical Review Letters, Vol. 126, No. 14, 141801, 07.04.2021.

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Harvard

The Muon g-2 Collaboration 2021, 'Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm', Physical Review Letters, vol. 126, no. 14, 141801. https://doi.org/10.1103/PhysRevLett.126.141801

APA

The Muon g-2 Collaboration (2021). Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm. Physical Review Letters, 126(14), [141801]. https://doi.org/10.1103/PhysRevLett.126.141801

Vancouver

The Muon g-2 Collaboration. Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm. Physical Review Letters. 2021 Apr 7;126(14):141801. doi: 10.1103/PhysRevLett.126.141801

Author

The Muon g-2 Collaboration. / Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm. In: Physical Review Letters. 2021 ; Vol. 126, No. 14.

BibTeX

@article{a95311df7a654ee6bda789805b9a92c5,
title = "Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm",
abstract = "We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly aμ(gμ-2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ωa between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ω p ′ in a spherical water sample at 34.7 °C. The ratio ωa/ω p ′, together with known fundamental constants, determines aμ(FNAL)=116 592 040(54)×10-11 (0.46 ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both μ+ and μ-, the new experimental average of aμ(Exp)=116 592 061(41)×10-11 (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.",
author = "{The Muon g-2 Collaboration} and B. Abi and T. Albahri and S. Al-Kilani and D. Allspach and Alonzi, {L. P.} and A. Anastasi and A. Anisenkov and F. Azfar and K. Badgley and S. Bae{\ss}ler and I. Bailey and Baranov, {V. A.} and E. Barlas-Yucel and T. Barrett and E. Barzi and A. Basti and F. Bedeschi and A. Behnke and M. Berz and M. Bhattacharya and Binney, {H. P.} and R. Bjorkquist and P. Bloom and J. Bono and E. Bottalico and T. Bowcock and D. Boyden and G. Cantatore and Carey, {R. M.} and J. Carroll and Casey, {B. C.K.} and D. Cauz and S. Ceravolo and R. Chakraborty and Chang, {S. P.} and A. Chapelain and S. Chappa and S. Charity and R. Chislett and J. Choi and Z. Chu and Chupp, {T. E.} and Convery, {M. E.} and A. Conway and G. Corradi and S. Corrodi and L. Cotrozzi and I. Logashenko and Shatunov, {Y. M.} and D. Shemyakin",
note = "Funding Information: We thank the Fermilab management and staff for their strong support of this experiment, as well as the tremendous support from our university and national laboratory engineers, technicians, and workshops. We are indebted to Akira Yamamoto, Lou Snydstrup, and Chien Pai who provided critical advice and engineering about the storage ring magnet and helped shepherd its transfer from Brookhaven to Fermilab. Greg Bock and Joe Lykken set the blinding clock and diligently monitored its stability. This result could not be interpreted without the worldwide theoretical effort to establish the standard model prediction, and in particular the recent work by the Muon Theory Initiative. The Muon Experiment was performed at the Fermi National Accelerator Laboratory, a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. Additional support for the experiment was provided by the Department of Energy offices of High Energy Physics and Nuclear Physics (USA), the National Science Foundation (USA), the Istituto Nazionale di Fisica Nucleare (Italy), the Science and Technology Facilities Council (UK), the Royal Society (UK), the European Union{\textquoteright}s Horizon 2020 research and innovation program under the Marie Sk{\l}odowska-Curie Grant Agreements No. 690835 and No. 734303, the National Natural Science Foundation of China (Grants No. 11975153 and No. 12075151), MSIP, NRF, and IBS-R017-D1 (Republic of Korea), and the German Research Foundation (DFG) through the Cluster of Excellence (EXC 2118/1, Project ID 39083149). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2021",
month = apr,
day = "7",
doi = "10.1103/PhysRevLett.126.141801",
language = "English",
volume = "126",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",

}

RIS

TY - JOUR

T1 - Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm

AU - The Muon g-2 Collaboration

AU - Abi, B.

AU - Albahri, T.

AU - Al-Kilani, S.

AU - Allspach, D.

AU - Alonzi, L. P.

AU - Anastasi, A.

AU - Anisenkov, A.

AU - Azfar, F.

AU - Badgley, K.

AU - Baeßler, S.

AU - Bailey, I.

AU - Baranov, V. A.

AU - Barlas-Yucel, E.

AU - Barrett, T.

AU - Barzi, E.

AU - Basti, A.

AU - Bedeschi, F.

AU - Behnke, A.

AU - Berz, M.

AU - Bhattacharya, M.

AU - Binney, H. P.

AU - Bjorkquist, R.

AU - Bloom, P.

AU - Bono, J.

AU - Bottalico, E.

AU - Bowcock, T.

AU - Boyden, D.

AU - Cantatore, G.

AU - Carey, R. M.

AU - Carroll, J.

AU - Casey, B. C.K.

AU - Cauz, D.

AU - Ceravolo, S.

AU - Chakraborty, R.

AU - Chang, S. P.

AU - Chapelain, A.

AU - Chappa, S.

AU - Charity, S.

AU - Chislett, R.

AU - Choi, J.

AU - Chu, Z.

AU - Chupp, T. E.

AU - Convery, M. E.

AU - Conway, A.

AU - Corradi, G.

AU - Corrodi, S.

AU - Cotrozzi, L.

AU - Logashenko, I.

AU - Shatunov, Y. M.

AU - Shemyakin, D.

N1 - Funding Information: We thank the Fermilab management and staff for their strong support of this experiment, as well as the tremendous support from our university and national laboratory engineers, technicians, and workshops. We are indebted to Akira Yamamoto, Lou Snydstrup, and Chien Pai who provided critical advice and engineering about the storage ring magnet and helped shepherd its transfer from Brookhaven to Fermilab. Greg Bock and Joe Lykken set the blinding clock and diligently monitored its stability. This result could not be interpreted without the worldwide theoretical effort to establish the standard model prediction, and in particular the recent work by the Muon Theory Initiative. The Muon Experiment was performed at the Fermi National Accelerator Laboratory, a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. Additional support for the experiment was provided by the Department of Energy offices of High Energy Physics and Nuclear Physics (USA), the National Science Foundation (USA), the Istituto Nazionale di Fisica Nucleare (Italy), the Science and Technology Facilities Council (UK), the Royal Society (UK), the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreements No. 690835 and No. 734303, the National Natural Science Foundation of China (Grants No. 11975153 and No. 12075151), MSIP, NRF, and IBS-R017-D1 (Republic of Korea), and the German Research Foundation (DFG) through the Cluster of Excellence (EXC 2118/1, Project ID 39083149). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/4/7

Y1 - 2021/4/7

N2 - We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly aμ(gμ-2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ωa between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ω p ′ in a spherical water sample at 34.7 °C. The ratio ωa/ω p ′, together with known fundamental constants, determines aμ(FNAL)=116 592 040(54)×10-11 (0.46 ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both μ+ and μ-, the new experimental average of aμ(Exp)=116 592 061(41)×10-11 (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.

AB - We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly aμ(gμ-2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ωa between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ω p ′ in a spherical water sample at 34.7 °C. The ratio ωa/ω p ′, together with known fundamental constants, determines aμ(FNAL)=116 592 040(54)×10-11 (0.46 ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both μ+ and μ-, the new experimental average of aμ(Exp)=116 592 061(41)×10-11 (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.

UR - http://www.scopus.com/inward/record.url?scp=85104363755&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.126.141801

DO - 10.1103/PhysRevLett.126.141801

M3 - Article

C2 - 33891447

AN - SCOPUS:85104363755

VL - 126

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

M1 - 141801

ER -

ID: 28379662