scholarly journals Hadronic light-by-light scattering contribution to the muon magnetic anomaly: Constituent quark loops and QCD effects

2011 ◽  
Vol 704 (3) ◽  
pp. 193-196 ◽  
Author(s):  
Radja Boughezal ◽  
Kirill Melnikov
Keyword(s):  
Light Scattering ◽  
Magnetic Anomaly ◽  
Constituent Quark ◽  
Scattering Contribution ◽  
Muon Magnetic Anomaly ◽  
Quark Loops

scholarly journals The discrepancy between τ and e + e − spectral functions revisited and the consequences for the muon magnetic anomaly

2010 ◽  
Vol 66 (1-2) ◽  
pp. 127-136 ◽  
Author(s):  
M. Davier ◽  
A. Hoecker ◽  
G. López Castro ◽  
B. Malaescu ◽  
X. H. Mo ◽  
...  
Keyword(s):  
Magnetic Anomaly ◽  
Spectral Functions ◽  
Muon Magnetic Anomaly

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.

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