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

Gilberto Colangelo; Martin Hoferichter; Massimiliano Procura; Peter Stoffer

doi:10.1051/epjconf/201817501025

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

Gilberto Colangelo
, Martin Hoferichter
, Massimiliano Procura
, Peter Stoffer

Teilchenphysik

Veröffentlichungen: Beitrag in Fachzeitschrift › Meeting Abstract/Conference Paper › Peer Reviewed

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.

Originalsprache	Englisch
Aufsatznummer	01025
Seitenumfang	18
Fachzeitschrift	EPJ Web of Conferences
Jahrgang	175
DOIs	https://doi.org/10.1051/epjconf/201817501025
Publikationsstatus	Veröffentlicht - 2018
Veranstaltung	35th International Symposium on Lattice Field Theory - Granada, Spanien Dauer: 18 Juni 2017 → 24 Juni 2017

Fördermittel

It is a pleasure to thank the organizers for the invitation to a very interesting Lattice conference and for their perfect organization of the event. I gratefully acknowledge help in preparing the slides on recent lattice progress in the calculation of HLbL by Christoph Lehner and Hartmut Wittig, who have also read and given useful comments on the manuscript. Participation to the conference and this work have been supported by the Swiss National Science Foundation. M.H. is supported by the DOE (Grant No. DE-FG02-00ER41132), M.P. by a Marie Curie Intra-European Fellowship of the European Community\u2019s 7th Framework Programme under contract number PIEF-GA-2013-622527, and P.S. by a grant of the Swiss National Science Foundation (Project No. P300P2_167751) and of the DOE (Grant No. DE-SC0009919).

ÖFOS 2012

103034 Teilchenphysik

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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. ",

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