EPJ Web Conf.
Volume 175, 201835th International Symposium on Lattice Field Theory (Lattice 2017)
|Number of page(s)||18|
|Section||1 Plenaries (in order of appearance)|
|Published online||26 March 2018|
Hadronic light-by-light contribution to (g - 2)μ: a dispersive approach
Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
2 Institute for Nuclear Theory, University of Washington, Seattle, WA 98195-1550, USA
3 Fakultät für Physik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria
4 Department of Physics, University of California at San Diego, La Jolla, CA 92093, USA
* Speaker, e-mail: firstname.lastname@example.org
Published online: 26 March 2018
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.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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