Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb
Year: 2025
Authors: Aguillard DP., Albahri T., Allspach D., Annala J., Badgley K., Baessler S., Bailey I., Bailey L., Barlas-Yucel E., Barrett T., Barzi E., Bedeschi F., Berz M., Bhattacharya M., Binney HP., Bloom P., Bono J., Bottalico E., Bowcock T., Braun S., Bressler M., Cantatore G., Carey RM., Casey BCK., Cauz D., Chakraborty R., Chapelain A., Chappa S., Charity S., Chen C., Cheng M., Chislett R., Chu Z., Chupp TE., Claessens C., Confortini F., Convery ME., Corrodi S., Cotrozzi L., Crnkovic JD., Dabagov S., Debevec PT., Di Falco S., Di Sciascio G., Donati S., Drendel B., Driutti A., Eads M., Edmonds A., Esquivel J., Farooq M., Fatemi R., Ferraby K., Ferrari C., Fertl M., Fienberg AT., Fioretti A., Flay D., Foster SB., Friedsam H., Froemming NS., Gabbanini C., Gaines I., Ganguly S., George J., Gibbons LK., Gioiosa A., Giovanetti KL., Girotti P., Gohn W., Goodenough L., Gorringe T., Grange J., Grant S., Gray F., Haciomeroglu S., Halewood-Leagas T., Hampai D., Han F., Hempstead J., Hertzog DW., Hesketh G., Hess E., Hibbert A., Hodge Z., Hoh SY., Hong KW., Hong R., Hu T., Hu Y., Iacovacci M., Incagli M., Israel S., Kammel P., Kargiantoulakis M., Karuza M., Kaspar J., Kawall D., Kelton L., Keshavarzi A., Kessler DS., Khaw KS., Khechadoorian Z., Kiburg B., Kiburg M., Kim O., Kinnaird N., Kraegeloh E., Labe KR., LaBounty J., Lancaster M., Lee S., Li B., Li D., Li L., Logashenko I., Campos AL., Lu Z., Luca A., Lukicov G., Lusiani A., Lyon AL., MacCoy B., Madrak R., Makino K., Mastroianni S., McCarthy R., Miller JP., Miozzi S., Mitra B., Morgan JP., Morse WM., Mott J., Nath A., Ng JK., Nguyen H., Oksuzian Y., Omarov Z., Osar W., Osofsky R., Park S., Pauletta G., Peck J., Piacentino GM., Pilato RN., Pitts KT., Plaster B., Pocanic D., Pohlman N., Polly CC., Price J., Quinn B., Qureshi MUH., Rakness G., Ramachandran S., Ramberg E., Reimann R., Roberts BL., Rubin DL., Sakurai M., Santi L., Schlesier C., Schreckenberger A., Semertzidis YK., Soha AK., Sorbara M., Stapleton J., Still D., Sttzckinger D., Stoughton C., Stratakis D., Swanson HE., Sweetmore G., Sweigart DA., Syphers MJ., Takeuchi Y., Tarazona DA., Teubner T., Tewsley-Booth AE., Tishchenko V., Tran NH., Turner W., Valetov E., Vasilkova D., Venanzoni G., Walton T., Weisskopf A., Welty-Rieger L., Winter P., Wu Y., Yu B., Yucel M., Zaid E., Zeng Y., Zhang C.
Autors Affiliation: Argonne Natl Lab, Lemont, IL USA; Boston Univ, Boston, MA USA; Brookhaven Natl Lab, Upton, NY USA; Budker Inst Nucl Phys, Novosibirsk, Russia; Inst Basic Sci IBS, Ctr Axion & Precis Phys CAPP, Daejeon, South Korea; Cornell Univ, Ithaca, NY USA; Fermilab Natl Accelerator Lab, Batavia, IL USA; INFN, Lab Nazl Frascati, Frascati, Italy; INFN, Sez Napoli, Naples, Italy; INFN, Sez Pisa, Pisa, Italy; INFN, Sez Roma Tor Vergata, Rome, Italy; INFN, Sez Trieste, Trieste, Italy; James Madison Univ, Dept Phys & Astron, Harrisonburg, VA USA; Johannes Gutenberg Univ Mainz, Inst Phys & Cluster Excellence PRISMA, Mainz, Germany; Korea Adv Inst Sci & Technol KAIST, Dept Phys, Daejeon, South Korea; Univ Lancaster, Lancaster, England; Michigan State Univ, E Lansing, MI USA; North Cent Coll, Naperville, IL USA; Northern Illinois Univ, De Kalb, IL USA; Regis Univ, Denver, CO USA; Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai, Peoples R China; Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai, Peoples R China; Trinity Univ, Dept Phys & Astron, San Antonio, TX USA; Tech Univ Dresden, Inst Kern & Teilchenphys, Dresden, Germany; Univ Molise, Campobasso, Italy; Univ Udine, Udine, Italy; UCL, Dept Phys & Astron, London, England; Univ Illinois, Urbana, IL USA; Univ Kentucky, Lexington, KY USA; Univ Liverpool, Liverpool, Merseyside, England; Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England; Univ Massachusetts, Dept Phys, Amherst, MA USA; Univ Michigan, Ann Arbor, MI 48109 USA; Univ Mississippi, University, MS USA; Univ Virginia, Charlottesville, VA USA; Univ Washington, Seattle, WA USA; CUNY York Coll, Jamaica, NY USA; Cockcroft Inst Accelerator Sci & Technol, Daresbury, England; Virginia Tech, Blacksburg, VA USA; Univ Trieste, Trieste, Italy; INFN, Sez Trieste, Grp Collegato Udine, Udine, Italy; State Key Lab Dark Matter Phys, Shanghai, Peoples R China; Key Lab Particle Astrophys & Cosmol, MOE, Shanghai, Peoples R China; Shanghai Key Lab Particle Phys & Cosmol, Shanghai, Peoples R China; Univ Napoli, Naples, Italy; Lebedev Phys Inst, Moscow, Russia; NRNU MEPhI, Moscow, Russia; Univ Pisa, Pisa, Italy; CNR, Ist Nazl Ottica, Pisa, Italy; Alliance Univ, Bangalore, Karnataka, India; INFN, Sez Roma Tor Vergata, Rome, Italy; INFN, Lab Nazl Frascati, Frascati, Italy; Istinye Univ, Istanbul, Turkiye; Univ Rijeka, Rijeka, Croatia; Zhejiang Lab, Hangzhou, Zhejiang, Peoples R China; Shenzhen Technol Univ, Shenzhen, Guangdong, Peoples R China; Novosibirsk State Univ, Novosibirsk, Russia; Scuola Normale Super Pisa, Pisa, Italy; Northeastern Univ, Boston, MA USA; Cornell Univ, Ithaca, NY USA; Univ Roma Tor Vergata, Rome, Italy; Inst Interdisciplinary Res Sci & Educ ICISE, Quy Nhon, Binh Dinh, Vietnam;
Abstract: A new measurement of the magnetic anomaly a(mu) of the positive muon is presented based on data taken from 2020 to 2023 by the Muon g – 2 Experiment at Fermi National Accelerator Laboratory (FNAL). This dataset contains over 2.5 times the total statistics of our previous results. From the ratio of the precession frequencies for muons and protons in our storage ring magnetic field, together with precisely known ratios of fundamental constants, we determine a(mu) = 1 165 920 710(162) x 10(-12) (139 ppb) for the new datasets, and a(mu) = 1 165 920 705(148) x 10(-12) (127 ppb) when combined with our previous results. The new experimental world average, dominated by the measurements at FNAL, is a(mu)(exp) = 1 165 920 715(145) x 10(-12) (124 ppb). The measurements at FNAL have improved the precision on the world average by over a factor of 4.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 135 (10) Pages from: 101802-1 to: 101802-13
More Information: We thank the Fermilab management and staff for their strong support of this experiment, as as our university and national laboratory engineers, technicians, and workshops for their tremendous support. Greg Bock, Joe Lykken, and Rick Ford set the blinding clock and diligently monitored its stability. We also thank members of the J-PARC Muon g-2/EDM experiment for the cross-calibration efforts. The Muon g -2 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 Forward Discovery Group, LLC, acting under Contract No. 89243024CSC000002. Additional support for the experiment was provided by the U.S. DOE Office of Science under the offices of HEP, NP, ASCR, and the U.S.-Japan Science and Technology Cooperation Program in HEP, the U.S. National Science Foundation, the Istituto Nazionale di Fisica Nucleare (Italy), the Science and Technology Facilities Council (United Kingdom), the Royal Society (United Kingdom), the National Natural Science Foundation of China (Grants No. 12475108, No. 12305217, No. 12075151), MSIP, NRF, and IBS-R017-D1 (Republic of Korea), the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, Germany) through the Cluster of Excellence PRISMA+ (EXC 2118/1, Project ID No. 39083149), the European Union Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreements No. 101006726 and No. 734303, the European Union STRONG 2020 project under Grant Agreement No. 824093, and the Leverhulme Trust, LIP-2021-014.KeyWords: Precision-measurement; ElectronDOI: 10.1103/7clf-sm2v
