scholarly journals Precision of a data-driven estimate of hadronic light-by-light scattering in the muong−2: Pseudoscalar-pole contribution

2016 ◽  
Vol 94 (5) ◽  
Author(s):  
Andreas Nyffeler
Keyword(s):  
Light Scattering ◽  
Data Driven ◽  
Pole Contribution

scholarly journals Towards a data-driven analysis of hadronic light-by-light scattering

2014 ◽  
Vol 738 ◽  
pp. 6-12 ◽  
Author(s):  
Gilberto Colangelo ◽  
Martin Hoferichter ◽  
Bastian Kubis ◽  
Massimiliano Procura ◽  
Peter Stoffer
Keyword(s):  
Light Scattering ◽  
Data Driven

scholarly journals Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g − 2)

2016 ◽  
Vol 31 (31) ◽  
pp. 1630034 ◽  
Author(s):  
Pablo Sanchez-Puertas ◽  
Pere Masjuan
Keyword(s):  
Systematic Uncertainty ◽  
Form Factors ◽  
Data Driven ◽  
Rational Approach ◽  
Transition Form ◽  
Pole Contribution ◽  
Model Independent ◽  
First Time

In this work, we present our recent results on a new and alternative data-driven determination for the hadronic light-by-light pseudoscalar pole contribution to the muon (g − 2). Our approach is based on Canterbury approximants, a rational approach to describe the required transition form factors, which provides a systematic and model-independent framework beyond traditional large-[Formula: see text] approaches. As a result, we obtain a competitive determination with errors according to future (g − 2) experiments including, for the first time, a well-defined systematic uncertainty.

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 contribution to the muon g – 2 on the lattice

2018 ◽  
Vol 179 ◽  
pp. 01017 ◽  
Author(s):  
Nils Asmussen ◽  
Antoine Gérardin ◽  
Jeremy Green ◽  
Oleksii Gryniuk ◽  
Georg von Hippel ◽  
...  
Keyword(s):  
Light Scattering ◽  
Lattice Qcd ◽  
Cross Sections ◽  
Pion Pole ◽  
Lattice Calculation ◽  
Pole Contribution ◽  
Virtual Pion ◽  
Scattering Contribution ◽  
Space Approach ◽  
The Continuum

We briefly review several activities at Mainz related to hadronic light-by-light scattering (HLbL) using lattice QCD. First we present a position-space approach to the HLbL contribution in the muon g̅2, where we focus on exploratory studies of the pion-pole contribution in a simple model and the lepton loop in QED in the continuum and in infinite volume. The second part describes a lattice calculation of the double-virtual pion transition form factor Fπ0γ*γ* (q21; q21) in the spacelike region with photon virtualities up to 1.5 GeV2 which paves the way for a lattice calculation of the pion-pole contribution to HLbL. The third topic involves HLbL forward scattering amplitudes calculated in lattice QCD which can be described, using dispersion relations (HLbL sum rules), by γ*γ* → hadrons fusion cross sections and then compared with phenomenological models.

scholarly journals Pion-pole contribution to hadronic light-by-light scattering

2020 ◽  
Author(s):  
Bai-Long Hoid ◽  
Martin Hoferichter ◽  
Bastian Kubis ◽  
Stefan Leupold ◽  
Sebastian Schneider
Keyword(s):  
Light Scattering ◽  
Pion Pole ◽  
Pole Contribution

scholarly journals Pion-Pole Contribution to Hadronic Light-By-Light Scattering in the Anomalous Magnetic Moment of the Muon

2018 ◽  
Vol 121 (11) ◽  
Author(s):  
Martin Hoferichter ◽  
Bai-Long Hoid ◽  
Bastian Kubis ◽  
Stefan Leupold ◽  
Sebastian P. Schneider
Keyword(s):  
Light Scattering ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Pion Pole ◽  
Pole Contribution

scholarly journals Recent progress in hadronic light-by-light scattering

2022 ◽  
Vol 258 ◽  
pp. 06004
Author(s):  
Martin Hoferichter
Keyword(s):  
Light Scattering ◽  
Lattice Qcd ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Recent Progress ◽  
Data Driven ◽  
Significant Progress

In recent years, significant progress in the calculation of the HLbL contribution to the anomalous magnetic moment of the muon has been achieved both with data-driven methods and in lattice QCD. In these proceedings I will discuss current developments aimed at controlling HLbL scattering at the level of 10%, as required for the final precision of the Fermilab E989 experiment.

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