Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm

被引：1092

作者：

Abi, B. ^{[44
]}

Albahri, T. ^{[39
]}

Al-Kilani, S. ^{[36
]}

Allspach, D. ^{[7
]}

Alonzi, L. P. ^{[48
]}

Anastasi, A. ^{[11
]}

Anisenkov, A. ^{[4
,49
]}

Azfar, F. ^{[44
]}

Badgley, K. ^{[7
]}

Baessler, S. ^{[47
,50
]}

Bailey, I ^{[19
,51
]}

Baranov, V. A. ^{[17
]}

Barlas-Yucel, E. ^{[37
]}

Barrett, T. ^{[6
]}

Barzi, E. ^{[7
]}

Basti, A. ^{[11
,32
]}

Bedeschi, F. ^{[11
]}

Behnke, A. ^{[22
]}

Berz, M. ^{[20
]}

Bhattacharya, M. ^{[43
]}

Binney, H. P. ^{[48
]}

Bjorkquist, R. ^{[6
]}

Bloom, P. ^{[21
]}

Bono, J. ^{[7
]}

Bottalico, E. ^{[11
,32
]}

Bowcock, T. ^{[39
]}

Boyden, D. ^{[22
]}

Cantatore, G. ^{[13
,34
]}

Carey, R. M. ^{[2
]}

Carroll, J. ^{[39
]}

Casey, B. C. K. ^{[7
]}

Cauz, D. ^{[8
,35
]}

Ceravolo, S. ^{[9
]}

Chakraborty, R. ^{[38
]}

Chang, S. P. ^{[5
,18
]}

Chapelain, A. ^{[6
]}

Chappa, S. ^{[7
]}

Charity, S. ^{[7
]}

Chislett, R. ^{[36
]}

Choi, J. ^{[5
]}

Chu, Z. ^{[26
,52
,53
]}

Chupp, T. E. ^{[42
]}

Convery, M. E. ^{[7
]}

Conway, A. ^{[41
]}

Corradi, G. ^{[9
]}

Corrodi, S. ^{[1
]}

Cotrozzi, L. ^{[11
,32
]}

Crnkovic, J. D. ^{[3
,37
,43
]}

Dabagov, S. ^{[9
,54
,55
]}

De Lurgio, P. M. ^{[1
]}

机构：

[1] Argonne Natl Lab, Lemont, IL USA

[2] Boston Univ, Boston, MA 02215 USA

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

[4] Budker Inst Nucl Phys, Novosibirsk, Russia

[5] Inst Basic Sci IBS, Ctr Axion & Precis Phys CAPP, Daejeon, South Korea

[6] Cornell Univ, Ithaca, NY USA

[7] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA

[8] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, Udine, Italy

[9] Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy

[10] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy

[11] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy

[12] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy

[13] Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy

[14] CNR, Ist Nazl Ott, Pisa, Italy

[15] James Madison Univ, Dept Phys & Astron, Harrisonburg, VA 22807 USA

[16] Johannes Gutenberg Univ Mainz, Inst Phys & Cluster Excellence PRISMA, Mainz, Germany

[17] Joint Inst Nucl Res, Dubna, Russia

[18] Korea Adv Inst Sci & Technol KAIST, Dept Phys, Daejeon, South Korea

[19] Univ Lancaster, Lancaster, England

[20] Michigan State Univ, E Lansing, MI 48824 USA

[21] North Cent Coll, Naperville, IL USA

[22] Northern Illinois Univ, De Kalb, IL 60115 USA

[23] Northwestern Univ, Evanston, IL USA

[24] Regis Univ, Denver, CO USA

[25] Scuola Normale Super Pisa, Pisa, Italy

[26] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai, Peoples R China

[27] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai, Peoples R China

[28] Tech Univ Dresden, Inst Kern & Teilchenphys, Dresden, Germany

[29] Univ Molise, Campobasso, Italy

[30] Univ Cassino & Lazio Merid, Cassino, Italy

[31] Univ Napoli, Naples, Italy

[32] Univ Pisa, Pisa, Italy

[33] Univ Roma Tor Vergata, Rome, Italy

[34] Univ Trieste, Trieste, Italy

[35] Univ Udine, Udine, Italy

[36] UCL, Dept Phys & Astron, London, England

[37] Univ Illinois, Urbana, IL USA

[38] Univ Kentucky, Lexington, KY USA

[39] Univ Liverpool, Liverpool, Merseyside, England

[40] Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England

[41] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[42] Univ Michigan, Ann Arbor, MI 48109 USA

[43] Univ Mississippi, University, MS 38677 USA

[44] Univ Oxford, Oxford, England

[45] Univ Rijeka, Rijeka, Croatia

[46] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[47] Univ Virginia, Charlottesville, VA USA

[48] Univ Washington, Seattle, WA 98195 USA

[49] Novosibirsk State Univ, Novosibirsk, Russia

[50] Oak Ridge Natl Lab, Oak Ridge, TN USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 14期

基金：

英国科学技术设施理事会; 美国国家科学基金会; 中国国家自然科学基金; 欧盟地平线“2020”;

关键词：

HYPERFINE-STRUCTURE; MESON CONTRIBUTIONS; G-2; WEAK;

D O I：

10.1103/PhysRevLett.126.141801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g - 2 Experiment for the positive muon magnetic anomaly a(mu) (g(mu) - 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 omega(a) 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 (omega) over tilde (p)' in a spherical water sample at 34.7 degrees C. The ratio omega(a)/(omega) over tilde (p)', together with known fundamental constants, determines a(mu)(FNAL) = 116 592 040(54) x 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 mu(+) and mu(-), the new experimental average of a(mu)(Exp) = 116 592 061(41) x 10(-11) (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.

引用

页数：11

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