The muon g-2: Dyson-Schwinger status on hadronic light-by-light scattering
High Energy Physics - Phenomenology
2014-12-18 v2 High Energy Physics - Lattice
Nuclear Theory
Abstract
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.
Keywords
Cite
@article{arxiv.1411.7876,
title = {The muon g-2: Dyson-Schwinger status on hadronic light-by-light scattering},
author = {Gernot Eichmann and Christian S. Fischer and Walter Heupel and Richard Williams},
journal= {arXiv preprint arXiv:1411.7876},
year = {2014}
}
Comments
11 pages, 7 figures, 2 tables. Proceedings of the 'XIth Quark Confinement and the Hadron Spectrum', September 8-12, 2014, St. Petersburg, Russia. Added references & fixed typos