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Title: The muon g-2: Dyson-Schwinger status on hadronic light-by-light scattering

We give a status report on the hadronic light-by-light scattering contribution to the muon’s anomalous magnetic moment from the Dyson-Schwinger approach. We discuss novel, model-independent properties of the light-by-light amplitude: we give its covariant decomposition in view of electromagnetic gauge invariance and Bose symmetry, and we identify the relevant kinematic regions that are probed under the integral. The decomposition of the amplitude at the quark level and the importance of its various diagrams are discussed and related to model approaches.
Authors:
; ; ;  [1]
  1. Institut für Theoretische Physik, Justus-Liebig–Universität Giessen, 35392 Giessen (Germany)
Publication Date:
OSTI Identifier:
22499032
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; DECOMPOSITION; DIAGRAMS; DYSON REPRESENTATION; GAUGE INVARIANCE; HADRONS; LIGHT SCATTERING; MAGNETIC MOMENTS; MUONS; QUARKS; SYMMETRY