scholarly journals Estimate of the Sixth-Order Contribution to the Anomalous Magnetic Moment of the Electron

1968 ◽  
Vol 168 (5) ◽  
pp. 1562-1567 ◽  
Author(s):  
Ronald G. Parsons
1975 ◽  
Vol 57 (5) ◽  
pp. 460-462 ◽  
Author(s):  
R. Barbieri ◽  
M. Caffo ◽  
E. Remiddi

1970 ◽  
Vol 33 (8) ◽  
pp. 605-606 ◽  
Author(s):  
A. De Rújula ◽  
B. Lautrup ◽  
A. Peterman

2018 ◽  
Vol 179 ◽  
pp. 01016
Author(s):  
Daisuke Nomura

We calculate the Standard Model (SM) prediction for the muon anomalous magnetic moment. By using the latest experimental data for e+e- → hadrons as input to dispersive integrals, we obtain the values of the leading order (LO) and the next-to-leading-order (NLO) hadronic vacuum polarisation contributions as ahad, LO VPμ = (693:27 ± 2:46) × 10-10 and ahad, NLO VP μ = (_9.82 ± 0:04) × 1010-10, respectively. When combined with other contributions to the SM prediction, we obtain aμ(SM) = (11659182:05 ± 3.56) × 10-10; which is deviated from the experimental value by Δaμ(exp) _ aμ(SM) = (27.05 ± 7.26) × 10-10. This means that there is a 3.7 σ discrepancy between the experimental value and the SM prediction. We also discuss another closely related quantity, the running QED coupling at the Z-pole, α(M2 Z). By using the same e+e- → hadrons data as input, our result for the 5-flavour quark contribution to the running QED coupling at the Z pole is Δ(5)had(M2 Z) = (276.11 ± 1.11) × 10-4, from which we obtain Δ(M2 Z) = 128.946 ± 0.015.


1978 ◽  
Vol 144 (2-3) ◽  
pp. 329-348 ◽  
Author(s):  
R. Barbieri ◽  
M. Caffo ◽  
E. Remiddi ◽  
S. Turrini ◽  
D. Oury

1980 ◽  
Vol 6 (1) ◽  
pp. 3-6 ◽  
Author(s):  
Morten L. Laursen ◽  
Mark A. Samuel ◽  
Ashok K. Ray

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