scholarly journals Hadronic light-by-light scattering contribution to muong−2

1996 ◽  
Vol 54 (5) ◽  
pp. 3137-3153 ◽  
Author(s):  
M. Hayakawa ◽  
T. Kinoshita ◽  
A. I. Sanda
Keyword(s):  
Light Scattering ◽  
Scattering Contribution

scholarly journals Exploratory studies for the position-space approach to hadronic light-by-light scattering in the muon g - 2

2018 ◽  
Vol 175 ◽  
pp. 06023 ◽  
Author(s):  
Nils Asmussen ◽  
Antoine Gérardin ◽  
Harvey B. Meyer ◽  
Andreas Nyffeler
Keyword(s):  
Light Scattering ◽  
Simple Model ◽  
Pion Pole ◽  
Infinite Volume ◽  
Pole Contribution ◽  
Position Space ◽  
Fermion Loop ◽  
Scattering Contribution ◽  
Space Approach ◽  
The Continuum

The well-known discrepancy in the muon g − 2 between experiment and theory demands further theory investigations in view of the upcoming new experiments. One of the leading uncertainties lies in the hadronic light-by-light scattering contribution (HLbL), that we address with our position-space approach. We focus on exploratory studies of the pion-pole contribution in a simple model and the fermion loop without gluon exchanges in the continuum and in infinite volume. These studies provide us with useful information for our planned computation of HLbL in the muon g − 2 using full QCD.

scholarly journals Hadronic light-by-light scattering in the muon g − 2

2019 ◽  
Vol 218 ◽  
pp. 01001
Author(s):  
Andreas Nyffeler
Keyword(s):  
Light Scattering ◽  
Lattice Qcd ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Current Status ◽  
Reliable Estimate ◽  
Model Calculations ◽  
Recent Developments ◽  
Model Independent ◽  
Scattering Contribution

We briefly review the current status of the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon. Based on various model calculations in the literature, we obtain the estimate $ \mathop a\nolimits_\mu ^{HLbL} = (102 \pm 39) \times \mathop {10}\nolimits^{ - 11} $. Recent developments including more model-independent approaches using dispersion relations and lattice QCD, that could lead to a more reliable estimate, are also discussed.

scholarly journals STATUS OF HADRONIC LIGHT-BY-LIGHT SCATTERING IN THE MUON g – 2

2014 ◽  
Vol 35 ◽  
pp. 1460456 ◽  
Author(s):  
ANDREAS NYFFELER
Keyword(s):  
Light Scattering ◽  
Recent Work ◽  
Current Situation ◽  
Open Problems ◽  
The Status ◽  
Work List ◽  
Scattering Contribution

We give an update on the status of the hadronic light-by-light scattering contribution to the muon g – 2. We review recent work, list some open problems and give an outlook on how to better control the uncertainty of this contribution. We think the estimate [Formula: see text] still gives a fair description of the current situation.

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