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We review the status of the anomalous magnetic moment of the muon as a precision probe of physics beyond the Standard Model (SM) after the release of the final results from the Fermi National Accelerator Laboratory (FNAL) Muon $g-2$…

High Energy Physics - Phenomenology · Physics 2026-02-19 David W. Hertzog , Martin Hoferichter

Anomalous magnetic moment of the muon, $a_{\mu}=(g_{\mu}-2)/2$, is one of the most precisely measured quantities in particle physics and it provides a stringent test of the Standard Model. The planned improvements of the experimental…

High Energy Physics - Lattice · Physics 2017-04-24 Marina Krstic Marinkovic

We show that muonium spectroscopy in the coming years can reach a precision high enough to determine the anomalous magnetic moment of the muon below one part per million (ppm). Such an independent determination of muon g-2, which is not…

High Energy Physics - Phenomenology · Physics 2022-01-19 Cédric Delaunay , Ben Ohayon , Yotam Soreq

We consider the anomalous magnetic moment of the muon $a_\mu$, which shows a significant deviation from the Standard Model expectation given the recent measurements at Fermilab and BNL. We focus on Standard Model Effective Field Theory…

High Energy Physics - Phenomenology · Physics 2022-11-09 Akanksha Bhardwaj , Christoph Englert , Panagiotis Stylianou

This paper introduces a new approach to measure the muon magnetic moment anomaly $a_{\mu} = (g-2)/2$, and the muon electric dipole moment (EDM) $d_{\mu}$ at the J-PARC muon facility. The goal of our experiment is to measure $a_{\mu}$ and…

The Fermilab Muon $g-2$ experiment recently reported its first measurement of the anomalous magnetic moment $a_\mu^{\textrm{FNAL}}$, which is in full agreement with the previous BNL measurement and pushes the world average deviation $\Delta…

High Energy Physics - Phenomenology · Physics 2021-10-11 Peter Athron , Csaba Balázs , Douglas HJ Jacob , Wojciech Kotlarski , Dominik Stöckinger , Hyejung Stöckinger-Kim

The Muon $(g-2)$ experiment, E821, at the Brookhaven AGS has the goal to measure the muon anomalous magnetic moment to a relative accuracy of $\pm 3.5 \times 10^{-7}$. A superferric 14 m diameter storage ring has been constructed and an…

High Energy Physics - Experiment · Physics 2007-05-23 B. Lee Roberts

The anomalous magnetic moments of both positive and negative muons are measured to the precision of 0.7 parts per million. Two values are in good agreement. The standard model calculations of muon g-2 are under further studies, especially…

High Energy Physics - Experiment · Physics 2007-05-23 H. Deng , for Muon g-2 Collaboration

We review how the muon anomalous magnetic moment ($g-2$) and the quest for lepton flavor violation are intimately correlated. Indeed the decay $\mu \to e \gamma$ is induced by the same amplitude for different choices of in- and outgoing…

High Energy Physics - Phenomenology · Physics 2017-12-08 Manfred Lindner , Moritz Platscher , Farinaldo S. Queiroz

The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $\omega_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data…

High Energy Physics - Experiment · Physics 2021-04-08 T. Albahri , A. Anastasi , A. Anisenkov , K. Badgley , S. Baeßler , I. Bailey , V. A. Baranov , E. Barlas-Yucel , T. Barrett , A. Basti , F. Bedeschi , M. Berz , M. Bhattacharya , H. P. Binney , P. Bloom , J. Bono , E. Bottalico , T. Bowcock , G. Cantatore , R. M. Carey , B. C. K. Casey , D. Cauz , R. Chakraborty , S. P. Chang , A. Chapelain , S. Charity , R. Chislett , J. Choi , Z. Chu , T. E. Chupp , S. Corrodi , L. Cotrozzi , J. D. Crnkovic , S. Dabagov , P. T. Debevec , S. Di Falco , P. Di Meo , G. Di Sciascio , R. Di Stefano , A. Driutti , V. N. Duginov , M. Eads , J. Esquivel , M. Farooq , R. Fatemi , C. Ferrari , M. Fertl , A. T. Fienberg , A. Fioretti , D. Flay , E. Frlež , N. S. Froemming , J. Fry , C. Gabbanini , M. D. Galati , S. Ganguly , A. Garcia , J. George , L. K. Gibbons , A. Gioiosa , K. L. Giovanetti , P. Girotti , W. Gohn , T. Gorringe , J. Grange , S. Grant , F. Gray , S. Haciomeroglu , T. Halewood-Leagas , D. Hampai , F. Han , J. Hempstead , A. T. Herrod , D. W. Hertzog , G. Hesketh , A. Hibbert , Z. Hodge , J. L. Holzbauer , K. W. Hong , R. Hong , M. Iacovacci , M. Incagli , P. Kammel , M. Kargiantoulakis , M. Karuza , J. Kaspar , D. Kawall , L. Kelton , A. Keshavarzi , D. Kessler , K. S. Khaw , Z. Khechadoorian , N. V. Khomutov , B. Kiburg , M. Kiburg , O. Kim , Y. I. Kim , B. King , N. Kinnaird , E. Kraegeloh , A. Kuchibhotla , N. A. Kuchinskiy , K. R. Labe , J. LaBounty , M. Lancaster , M. J. Lee , S. Lee , S. Leo , B. Li , D. Li , L. Li , I. Logashenko , A. Lorente Campos , A. Lucà , G. Lukicov , A. Lusiani , A. L. Lyon , B. MacCoy , R. Madrak , K. Makino , F. Marignetti , S. Mastroianni , J. P. Miller , S. Miozzi , W. M. Morse , J. Mott , A. Nath , H. Nguyen , R. Osofsky , S. Park , G. Pauletta , G. M. Piacentino , R. N. Pilato , K. T. Pitts , B. Plaster , D. Počanić , N. Pohlman , C. C. Polly , J. Price , B. Quinn , N. Raha , S. Ramachandran , E. Ramberg , J. L. Ritchie , B. L. Roberts , D. L. Rubin , L. Santi , C. Schlesier , A. Schreckenberger , Y. K. Semertzidis , D. Shemyakin , M. W. Smith , M. Sorbara , D. Stöckinger , J. Stapleton , C. Stoughton , D. Stratakis , T. Stuttard , H. E. Swanson , G. Sweetmore , D. A. Sweigart , M. J. Syphers , D. A. Tarazona , T. Teubner , A. E. Tewsley-Booth , K. Thomson , V. Tishchenko , N. H. Tran , W. Turner , E. Valetov , D. Vasilkova , G. Venanzoni , T. Walton , A. Weisskopf , L. Welty-Rieger , P. Winter , A. Wolski , W. Wu

We study the effects on a non-universal $U(1)_{X}$ extension of the Standard Model given the alternative value obtained by the Budapest-Marseille-Wuppertal (BMW) group for the anomalous magnetic moment of the muon $g-2$. The model explains…

High Energy Physics - Phenomenology · Physics 2025-04-16 J. S. Alvarado , R. Martinez , Cristian Sierra

Recently CDF II Collaboration reported that they measured W boson mass precisely. The measurement is deviated from the Standard Model (SM) Prediction at 7$\sigma$. Also, the recent FNAL measurement of the muon magnetic moment shows a…

High Energy Physics - Phenomenology · Physics 2022-06-08 Jongkuk Kim

The long-standing muon $g-2$ anomaly has been confirmed recently at the Fermilab. The combined discrepancy from Fermilab and Brookhaven results shows a difference from the theory at a significance of 4.2 $\sigma$. In addition, the LHC has…

High Energy Physics - Phenomenology · Physics 2021-06-04 Wen Yin

We update our Standard Model predictions for g-2 of the muon and for the hadronic contributions to the running of the QED coupling, Delta alpha_had^(5)(M_Z^2). Particular emphasis is put on recent changes in the hadronic contributions from…

High Energy Physics - Phenomenology · Physics 2015-05-28 K. Hagiwara , R. Liao , A. D. Martin , Daisuke Nomura , T. Teubner

About 3 sigma deviation from the standard model prediction of muon anomalous magnetic moment (muon g-2) has been reported. We consider new physics beyond the standard model which has new Yukawa interactions with muon. We compute new…

High Energy Physics - Phenomenology · Physics 2015-06-05 Shunichi Kanemitsu , Kazuhiro Tobe

We update the Standard Model predictions of the anomalous magnetic moment of the muon, a_\mu = (g-2)/2, and the value of the QED coupling at the Z-boson mass, incorporating the new e^+e^- \to \pi\pi data obtained by CMD-2 and KLOE, as well…

High Energy Physics - Phenomenology · Physics 2008-11-26 K. Hagiwara , A. D. Martin , Daisuke Nomura , T. Teubner

QED, Hadronic, and Electroweak Standard Model contributions to the muon anomalous magnetic moment, a_mu = (g_mu-2)/2, and their theoretical uncertainties are scrutinized. The status and implications of the recently reported 2.6 sigma…

High Energy Physics - Phenomenology · Physics 2009-11-07 Andrzej Czarnecki , William J. Marciano

We study the effects of extra dimensions on the muon anomalous magnetic moment with brane fluctuation. Since the coupling is naturally suppressed if brane fluctuation is considered by exponential softening factor for heavier states, the…

High Energy Physics - Phenomenology · Physics 2009-11-07 Seong Chan Park , H. S. ~Song

This article reviews the muon g-2 experiment, a cornerstone in precision tests of the Standard Model of particle physics. The experiment measures the anomalous magnetic moment of the muon with unprecedented accuracy, seeking potential…

High Energy Physics - Experiment · Physics 2025-08-06 Marin Karuza

We review the role of the anomalous magnetic moment of the muon a_\mu as a powerful probe of physics beyond the Standard Model (BSM), taking advantage of the final result of the Fermilab g-2 experiment and the recently updated Standard…

High Energy Physics - Phenomenology · Physics 2026-02-27 Peter Athron , Kilian Möhling , Dominik Stöckinger , Hyejung Stöckinger-Kim