scholarly journals Four-flavour leading-order hadronic contribution to the muon anomalous magnetic moment

2014 ◽  
Vol 2014 (2) ◽  
Author(s):  
Florian Burger ◽  
◽  
Xu Feng ◽  
Grit Hotzel ◽  
Karl Jansen ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Leading Order ◽  
Muon Anomalous Magnetic Moment ◽  
Hadronic Contribution

scholarly journals Hadronic contribution to the muon anomalous magnetic moment to next-to-next-to-leading order

2014 ◽  
Vol 734 ◽  
pp. 144-147 ◽  
Author(s):  
Alexander Kurz ◽  
Tao Liu ◽  
Peter Marquard ◽  
Matthias Steinhauser
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Leading Order ◽  
Muon Anomalous Magnetic Moment ◽  
Hadronic Contribution

scholarly journals Leading-order hadronic contribution to the anomalous magnetic moment of the muon from $N_f=2+1+1$ twisted mass fermions

2014 ◽  
Author(s):  
Grit Hotzel ◽  
Florian Burger ◽  
Xu Feng ◽  
Karl Jansen ◽  
Marcus Petschlies ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Leading Order ◽  
Twisted Mass ◽  
Hadronic Contribution

scholarly journals Hadronic Leading Order Contribution to the Muon g-2

2018 ◽  
Vol 179 ◽  
pp. 01016
Author(s):  
Daisuke Nomura
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Leading Order ◽  
Muon Anomalous Magnetic Moment ◽  
Order Contribution ◽  
Quark Contribution ◽  
The Standard Model ◽  
Vacuum Polarisation

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.

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