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The Muon g-2 Experiment (E989) at Fermilab measures the muon magnetic anomaly, aiming to resolve the greater than 3$\sigma$ discrepancy between the previous measurement and the Standard Model calculation with an improved precision of 140…

Instrumentation and Detectors · Physics 2020-01-10 Ran Hong

The Muon g-2 Experiment (E989) at Fermilab is seeking to measure the anomalous magnetic moment of muon ($a_{\mu}$) with a precision of 140 parts-per-billion (ppb) and aiming to resolve the discrepancy between the E821 measurement and the…

Instrumentation and Detectors · Physics 2018-10-10 Ran Hong

The Muon $g\textrm{-}2$ Experiment (E989) at Fermilab has a goal of measuring the muon anomaly ($a_\mu$) with unprecedented precision using positive muons. This measurement is motivated by the difference between the previous Brookhaven…

Accelerator Physics · Physics 2020-09-25 Eremey Valetov

The bosonic two-loop electroweak radiative corrections to the muon's anomalous magnetic moment, $a_\mu\equiv (g_\mu-2)/2$, are presented. We find $\Delta a_\mu^{\rm EW}({\rm 2\,loop\, bosonic})/ a_\mu^{\rm EW}({\rm 1\,loop})\approx…

High Energy Physics - Phenomenology · Physics 2014-11-17 Andrzej Czarnecki , Bernd Krause , William J. Marciano

We consider possible beyond-the-Standard-Model (BSM) effects that can accommodate both the long-standing tension in the anomalous magnetic moment of the muon, $a_\mu=(g-2)_\mu/2$, as well as the emerging $2.5\sigma$ deviation in its…

High Energy Physics - Phenomenology · Physics 2019-05-13 Andreas Crivellin , Martin Hoferichter

The Muon $g-2$ experiment at Fermilab aims to measure the muon anomalous magnetic moment with an unprecedented precision of 140 parts per billion (ppb). Data collection concluded in June 2023, and analysis of the largest dataset (2021-2023)…

High Energy Physics - Experiment · Physics 2024-12-25 On Kim

The Muon g-2 collaboration has measured the anomalous magnetic g value, a = (g-2)/2, of the positive muon with an unprecedented uncertainty of 0.7 parts per million. The result, based on data collected in the year 2000 at Brookhaven…

High Energy Physics - Experiment · Physics 2019-08-14 E. P. Sichtermann

This work demonstrates that two systematic errors, coherent betatron oscillations (CBO) and muon losses can be reduced through application of radio frequency (RF) electric fields, which ultimately increases the sensitivity of the muon $g-2$…

We reveal all linear order inertial and gravitational effects on a non-relativistic Dirac particle (mass $m$) on the Earth up to the order of $1/m$ in the Foldy-Wouthuysen-like expansion. Applying the result to Penning trap experiments…

General Relativity and Quantum Cosmology · Physics 2022-04-19 Asuka Ito

A new experiment to measure the muon g-2 factor is proposed. We suppose the sensitivity of this experiment to be about 0.03 ppm. The developed experiment can be performed on an ordinary storage ring with a noncontinuous field created by…

High Energy Physics - Experiment · Physics 2011-06-27 Alexander J. Silenko

We examine electron and muon anomalous magnetic dipole moments within a radiative neutrino mass model featuring TeV-scale scalar leptoquarks $S(3,1,-1/3)$ and $R(3,2,1/6)$. We utilize textures with decoupling electron and muon sectors, so…

High Energy Physics - Phenomenology · Physics 2026-02-19 Bayu Dirgantara , J. Julio

At the Paul Scherrer Institute (PSI) we are developing a high precision instrument to measure the muon electric dipole moment (EDM). The experiment is based on the frozen-spin method in which the spin precession induced by the anomalous…

High Energy Physics - Experiment · Physics 2023-05-03 Chavdar Dutsov , Timothy Hume , Philipp Schmidt-Wellenburg

The Muon g-2 experiment at Fermilab will measure the anomalous magnetic moment of the muon to a precision of 140 parts per billion, which is a factor of four improvement over the previous E821 measurement at Brookhaven. The experiment will…

High Energy Physics - Experiment · Physics 2018-07-01 J. L. Holzbauer

The anomalous magnetic and electric dipole moments in spin motion equation acquire pseudoscalar corrections if the $T(CP)$-noninvariance is admitted. It allows to explain the discrepancy between experimental and theoretical values of muon…

High Energy Physics - Phenomenology · Physics 2022-02-23 V. G. Baryshevsky , P. I. Porshnev

The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics. In a recent experiment at Brookhaven it has been measured with a remarkable 14-fold improvement of the previous CERN experiment…

High Energy Physics - Phenomenology · Physics 2015-05-13 Fred Jegerlehner , Andreas Nyffeler

The corrections to g-mode frequencies caused by the presence of a central magnetic field and rotation of the Sun are calculated. The calculations are carried out in the simple one dimensional magnetohydrodynamical model using the…

Astrophysics · Physics 2009-02-25 Maxim Dvornikov , Timur Rashba , Victor Semikoz

The Muon g-2 Experiment at Fermilab will measure the anomalous magnetic moment of the muon to a precision of 140 parts per billion, which is a factor of four improvement over the previous E821 measurement at Brookhaven. The experiment will…

Instrumentation and Detectors · Physics 2017-01-04 J. L. Holzbauer

The E989 Muon $g-2$ experiment at Fermilab aims to measure the anomalous magnetic moment, $a^{}_\mu$, of the muon with a precision of 140 parts-per-billion. This requires a precise measurement of both the anomalous spin precession…

Instrumentation and Detectors · Physics 2021-02-11 S. Corrodi , P. De Lurgio , D. Flay , J. Grange , R. Hong , D. Kawall , M. Oberling , S. Ramachandran , P. Winter

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

The stringent experimental bound on $\mu \rightarrow e \gamma$ is compatible with a simultaneous and sizable new physics contribution to the electron and muon anomalous magnetic moments $(g-2)_\ell$ ($\ell=e,\,\mu$), only if we assume a…

High Energy Physics - Phenomenology · Physics 2020-06-18 Lorenzo Calibbi , M. L. López-Ibáñez , Aurora Melis , Oscar Vives