Towards a data-driven analysis of hadronic light-by-light scattering

Colangelo, Gilberto; Hoferichter, Martin; Kubis, Bastian; Procura, Massimiliano; Stoffer, Peter (2014). Towards a data-driven analysis of hadronic light-by-light scattering. Physics letters. B, 738, pp. 6-12. Elsevier 10.1016/j.physletb.2014.09.021

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The hadronic light-by-light contribution to the anomalous magnetic moment of the muon was recently analyzed in the framework of dispersion theory, providing a systematic formalism where all input quantities are expressed in terms of on-shell form factors and scattering amplitudes that are in principle accessible in experiment. We briefly review the main ideas behind this framework and discuss the various experimental ingredients needed for the evaluation of one- and two-pion intermediate states. In particular, we identify processes that in the absence of data for doubly-virtual pion–photon interactions can help constrain parameters in the dispersive reconstruction of the relevant input quantities, the pion transition form factor and the helicity partial waves for γ⁎γ⁎→ππ.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Colangelo, Gilberto; Hoferichter, Martin; Procura, Massimiliano and Stoffer, Peter

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

24 Nov 2014 14:43

Last Modified:

26 Jun 2016 01:56

Publisher DOI:

10.1016/j.physletb.2014.09.021

BORIS DOI:

10.7892/boris.60231

URI:

https://boris.unibe.ch/id/eprint/60231

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