Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb

D P Aguillard¹, T Albahri², D Allspach³, J Annala³, K Badgley³, S Baeßler⁴, I Bailey⁵, L Bailey⁶, E Barlas-Yucel⁷, T Barrett⁸, E Barzi³, F Bedeschi⁹, M Berz¹⁰, M Bhattacharya³, H P Binney¹¹, P Bloom¹², J Bono³, E Bottalico², T Bowcock², S Braun¹¹, M Bressler¹³, G Cantatore¹⁴, R M Carey¹⁵, B C K Casey³, D Cauz¹⁶, R Chakraborty¹⁷, A Chapelain⁸, S Chappa³, S Charity², C Chen^{18

19}, M Cheng⁷, R Chislett⁶, Z Chu¹⁸, T E Chupp¹, C Claessens¹¹, F Confortini²⁰, M E Convery³, S Corrodi²¹, L Cotrozzi², J D Crnkovic³, S Dabagov²², P T Debevec⁷, S Di Falco⁹, G Di Sciascio²³, S Donati⁹, B Drendel³, A Driutti^{9

17}, M Eads²⁴, A Edmonds^{15

25}, J Esquivel³, M Farooq¹, R Fatemi¹⁷, K Ferraby², C Ferrari⁹, M Fertl²⁶, A T Fienberg¹¹, A Fioretti⁹, D Flay¹³, S B Foster^{15

17}, H Friedsam³, N S Froemming²⁴, C Gabbanini⁹, I Gaines³, S Ganguly³, J George¹³, L K Gibbons⁸, A Gioiosa²⁷, K L Giovanetti²⁸, P Girotti⁹, W Gohn¹⁷, L Goodenough³, T Gorringe¹⁷, J Grange¹, S Grant^{21

6}, F Gray²⁹, S Haciomeroglu³⁰, T Halewood-Leagas², D Hampai²², F Han¹⁷, J Hempstead¹¹, D W Hertzog¹¹, G Hesketh⁶, E Hess⁹, A Hibbert², Z Hodge¹¹, S Y Hoh^{18

19}, K W Hong⁴, R Hong^{21

17}, T Hu^{18

19}, Y Hu¹⁸, M Iacovacci²⁰, M Incagli⁹, S Israel^{15

13}, P Kammel¹¹, M Kargiantoulakis³, M Karuza¹⁴, J Kaspar¹¹, D Kawall¹³, L Kelton^{31

17}, A Keshavarzi³², D S Kessler¹³, K S Khaw^{18

19}, Z Khechadoorian⁸, B Kiburg³, M Kiburg^{3

12}, O Kim³³, N Kinnaird¹⁵, E Kraegeloh¹, K R Labe⁸, J LaBounty¹¹, M Lancaster³², S Lee³⁰, B Li¹⁸, D Li¹⁸, L Li¹⁸, I Logashenko³⁴, A Lorente Campos¹⁷, Z Lu¹⁸, A Lucà³, G Lukicov⁶, A Lusiani⁹, A L Lyon³, B MacCoy¹¹, R Madrak³, K Makino¹⁰, S Mastroianni²⁰, R McCarthy¹⁵, J P Miller¹⁵, S Miozzi²³, B Mitra³³, J P Morgan³, W M Morse³⁵, J Mott³, A Nath²⁰, J K Ng^{18

19}, H Nguyen³, Y Oksuzian²¹, Z Omarov^{30

36}, W Osar⁸, R Osofsky¹¹, S Park³⁰, G Pauletta¹⁶, J Peck¹⁷, G M Piacentino²⁷, R N Pilato², K T Pitts⁷, B Plaster¹⁷, D Počanić⁴, N Pohlman²⁴, C C Polly³, J Price², B Quinn³³, M U H Qureshi²⁶, G Rakness³, S Ramachandran²¹, E Ramberg³, R Reimann²⁶, B L Roberts¹⁵, D L Rubin⁸, M Sakurai⁶, L Santi¹⁶, C Schlesier⁷, A Schreckenberger³, Y K Semertzidis^{30

36}, A K Soha³, M Sorbara²³, J Stapleton³, D Still³, D Stöckinger³⁷, C Stoughton³, D Stratakis³, H E Swanson¹¹, G Sweetmore³², D A Sweigart⁸, M J Syphers²⁴, Y Takeuchi^{18

19}, D A Tarazona⁸, T Teubner², A E Tewsley-Booth^{17

1}, V Tishchenko³⁵, N H Tran¹⁵, W Turner², E Valetov¹⁰, D Vasilkova², G Venanzoni², T Walton³, A Weisskopf¹⁰, L Welty-Rieger³, P Winter²¹, Y Wu²¹, B Yu³³, M Yucel³, E Zaid², Y Zeng^{18

19}, C Zhang²; Muon <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>g</mi><mo>−</mo><mn>2</mn></math> Collaboration

Affiliations

¹ University of Michigan, Ann Arbor, Michigan, USA.
² University of Liverpool, Liverpool, United Kingdom.
³ Fermi National Accelerator Laboratory, Batavia, Illinois, USA.
⁴ University of Virginia, Charlottesville, Virginia, USA.
⁵ Lancaster University, Lancaster, United Kingdom.
⁶ University College London, Department of Physics and Astronomy, London, United Kingdom.
⁷ University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.
⁸ Cornell University, Ithaca, New York, USA.
⁹ INFN, Sezione di Pisa, Pisa, Italy.
¹⁰ Michigan State University, East Lansing, Michigan, USA.
¹¹ University of Washington, Seattle, Washington, USA.
¹² North Central College, Naperville, Illinois, USA.
¹³ University of Massachusetts, Department of Physics, Amherst, Massachusetts, USA.
¹⁴ INFN, Sezione di Trieste, Trieste, Italy.
¹⁵ Boston University, Boston, Massachusetts, USA.
¹⁶ Università di Udine, Udine, Italy.
¹⁷ University of Kentucky, Lexington, Kentucky, USA.
¹⁸ Shanghai Jiao Tong University, School of Physics and Astronomy, Shanghai, China.
¹⁹ Shanghai Jiao Tong University, Tsung-Dao Lee Institute, Shanghai, China.
²⁰ INFN, Sezione di Napoli, Naples, Italy.
²¹ Argonne National Laboratory, Lemont, Illinois, USA.
²² INFN, Laboratori Nazionali di Frascati, Frascati, Italy.
²³ INFN, Sezione di Roma Tor Vergata, Rome, Italy.
²⁴ Northern Illinois University, DeKalb, Illinois, USA.
²⁵ City University of New York at York College, Jamaica, New York, USA.
²⁶ Johannes Gutenberg University Mainz, Institute of Physics and Cluster of Excellence PRISMA+, Mainz, Germany.
²⁷ Università del Molise, Campobasso, Italy.
²⁸ James Madison University, Department of Physics and Astronomy, Harrisonburg, Virginia, USA.
²⁹ Regis University, Denver, Colorado, USA.
³⁰ Center for Axion and Precision Physics (CAPP)/Institute for Basic Science (IBS), Daejeon, Republic of Korea.
³¹ Trinity University, Department of Physics and Astronomy, San Antonio, Texas, USA.
³² University of Manchester, Department of Physics and Astronomy, Manchester, United Kingdom.
³³ University of Mississippi, University, Mississippi, USA.
³⁴ Budker Institute of Nuclear Physics, Novosibirsk, Russia.
³⁵ Brookhaven National Laboratory, Upton, New York, USA.
³⁶ Korea Advanced Institute of Science and Technology (KAIST), Department of Physics, Daejeon, Republic of Korea.
³⁷ Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany.

PMID: 40981547
DOI: 10.1103/7clf-sm2v

Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb

D P Aguillard et al. Phys Rev Lett. 2025.

. 2025 Sep 5;135(10):101802.

doi: 10.1103/7clf-sm2v.

Authors

Affiliations

¹ University of Michigan, Ann Arbor, Michigan, USA.
² University of Liverpool, Liverpool, United Kingdom.
³ Fermi National Accelerator Laboratory, Batavia, Illinois, USA.
⁴ University of Virginia, Charlottesville, Virginia, USA.
⁵ Lancaster University, Lancaster, United Kingdom.
⁶ University College London, Department of Physics and Astronomy, London, United Kingdom.
⁷ University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.
⁸ Cornell University, Ithaca, New York, USA.
⁹ INFN, Sezione di Pisa, Pisa, Italy.
¹⁰ Michigan State University, East Lansing, Michigan, USA.
¹¹ University of Washington, Seattle, Washington, USA.
¹² North Central College, Naperville, Illinois, USA.
¹³ University of Massachusetts, Department of Physics, Amherst, Massachusetts, USA.
¹⁴ INFN, Sezione di Trieste, Trieste, Italy.
¹⁵ Boston University, Boston, Massachusetts, USA.
¹⁶ Università di Udine, Udine, Italy.
¹⁷ University of Kentucky, Lexington, Kentucky, USA.
¹⁸ Shanghai Jiao Tong University, School of Physics and Astronomy, Shanghai, China.
¹⁹ Shanghai Jiao Tong University, Tsung-Dao Lee Institute, Shanghai, China.
²⁰ INFN, Sezione di Napoli, Naples, Italy.
²¹ Argonne National Laboratory, Lemont, Illinois, USA.
²² INFN, Laboratori Nazionali di Frascati, Frascati, Italy.
²³ INFN, Sezione di Roma Tor Vergata, Rome, Italy.
²⁴ Northern Illinois University, DeKalb, Illinois, USA.
²⁵ City University of New York at York College, Jamaica, New York, USA.
²⁶ Johannes Gutenberg University Mainz, Institute of Physics and Cluster of Excellence PRISMA+, Mainz, Germany.
²⁷ Università del Molise, Campobasso, Italy.
²⁸ James Madison University, Department of Physics and Astronomy, Harrisonburg, Virginia, USA.
²⁹ Regis University, Denver, Colorado, USA.
³⁰ Center for Axion and Precision Physics (CAPP)/Institute for Basic Science (IBS), Daejeon, Republic of Korea.
³¹ Trinity University, Department of Physics and Astronomy, San Antonio, Texas, USA.
³² University of Manchester, Department of Physics and Astronomy, Manchester, United Kingdom.
³³ University of Mississippi, University, Mississippi, USA.
³⁴ Budker Institute of Nuclear Physics, Novosibirsk, Russia.
³⁵ Brookhaven National Laboratory, Upton, New York, USA.
³⁶ Korea Advanced Institute of Science and Technology (KAIST), Department of Physics, Daejeon, Republic of Korea.
³⁷ Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany.

PMID: 40981547
DOI: 10.1103/7clf-sm2v

Abstract

A new measurement of the magnetic anomaly a_{μ} 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_{μ}=1 165 920 710(162)×10^{-12} (139 ppb) for the new datasets, and a_{μ}=1 165 920 705(148)×10^{-12} (127 ppb) when combined with our previous results. The new experimental world average, dominated by the measurements at FNAL, is a_{μ}(exp)=1 165 920 715(145)×10^{-12} (124 ppb). The measurements at FNAL have improved the precision on the world average by over a factor of 4.

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Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb

Affiliations

Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources

Research Materials