scholarly journals PRECISION MEASUREMENT OF THE ANOMALOUS MAGNETIC MOMENT OF THE MUON

2005 ◽  
Author(s):  
JONATHAN M. PALEY ◽  
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Precision Measurement

scholarly journals Precision measurement of the anomalous magnetic moment of the muon

1968 ◽  
Vol 28 (4) ◽  
pp. 287-290 ◽  
Author(s):  
J. Bailey ◽  
W. Bartl ◽  
G. Von Bochmann ◽  
R.C.A. Brown ◽  
F.J.M. Farley ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Precision Measurement

A NON-SM CHARGE RADIUS AND NON-SM ANAPOLE MOMENT OF A DIRAC NEUTRINO AND THE HIGH PRECISION MEASUREMENT OF THE MUON (g - 2)

2003 ◽  
Vol 18 (09) ◽  
pp. 1587-1594
Author(s):  
R. M. GARCÍA-HIDALGO ◽  
A. ROSADO
Keyword(s):  
Dispersion Relation ◽  
Standard Model ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Precision Measurement ◽  
Charge Radius ◽  
Unsubtracted Dispersion Relation ◽  
High Precision Measurement ◽  
Anapole Moment ◽  
Dirac Neutrino

We assume that the Dirac neutrino possesses a physical non-standard model charge radius [Formula: see text] and a physical non-standard model anapole moment [Formula: see text] and calculate the contribution of these quantities to the anomalous magnetic moment of the muon aμ using an unsubtracted dispersion relation. We find that these contributions can be important and allow us to set the bound [Formula: see text].

scholarly journals Two and three pseudoscalar production in e+e− annihilation and their contributions to (g − 2)μ

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Wen Qin ◽  
Ling-Yun Dai ◽  
Jorge Portolés
Keyword(s):  
Experimental Data ◽  
Theoretical Prediction ◽  
Pseudoscalar Meson ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Vacuum Polarization ◽  
Meson Production ◽  
The Other ◽  
Joint Analysis ◽  
The Standard Model

Abstract A coherent study of e+e− annihilation into two (π+π−, K+K−) and three (π+π−π0, π+π−η) pseudoscalar meson production is carried out within the framework of resonance chiral theory in energy region E ≲ 2 GeV. The work of [L.Y. Dai, J. Portolés, and O. Shekhovtsova, Phys. Rev. D88 (2013) 056001] is revisited with the latest experimental data and a joint analysis of two pseudoscalar meson production. Hence, we evaluate the lowest order hadronic vacuum polarization contributions of those two and three pseudoscalar processes to the anomalous magnetic moment of the muon. We also estimate some higher-order additions led by the same hadronic vacuum polarization. Combined with the other contributions from the standard model, the theoretical prediction differs still by (21.6 ± 7.4) × 10−10 (2.9σ) from the experimental value.

scholarly journals Stochastic computation of g − 2 in QED

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Ryuichiro Kitano ◽  
Hiromasa Takaura ◽  
Shoji Hashimoto
Keyword(s):  
Perturbation Theory ◽  
Numerical Computation ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Stochastic Perturbation ◽  
Higher Order ◽  
Feynman Diagrams ◽  
Perturbative Series ◽  
Physical Quantities

Abstract We perform a numerical computation of the anomalous magnetic moment (g − 2) of the electron in QED by using the stochastic perturbation theory. Formulating QED on the lattice, we develop a method to calculate the coefficients of the perturbative series of g − 2 without the use of the Feynman diagrams. We demonstrate the feasibility of the method by performing a computation up to the α3 order and compare with the known results. This program provides us with a totally independent check of the results obtained by the Feynman diagrams and will be useful for the estimations of not-yet-calculated higher order values. This work provides an example of the application of the numerical stochastic perturbation theory to physical quantities, for which the external states have to be taken on-shell.

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