Hadronic light-by-light contribution to (g - 2) μ: A dispersive approach

Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura, Peter Stoffer

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Abstract

After a brief introduction on ongoing experimental and theoretical activities on (g - 2) μ, we report on recent progress in approaching the calculation of the hadronic light-by-light contribution with dispersive methods. General properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation are discussed. On this basis a numerical estimate for the pion box contribution and its rescattering corrections is obtained. We conclude with an outlook for this approach to the calculation of hadronic light-by-light.

Original languageEnglish
Article number01025
Number of pages18
JournalEPJ Web of Conferences
Volume175
DOIs
Publication statusPublished - 2018
Event35th International Symposium on Lattice Field Theory - Granada, Spain
Duration: 18 Jun 201724 Jun 2017

Austrian Fields of Science 2012

  • 103034 Particle physics

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