# 4 Dispersive approach to hadronic light-by-light scattering

Article · Gilberto Colangelo A, Martin Hoferichter, Massimiliano Procura A, Peter Stoffer

- Archive id: doi:10.7892/boris.60234
- Published: 2014-01-01
- DOI: https://doi.org/10.7892/boris.60234
- Citations: 172
- Source URL: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.764.334
- Provenance: openalex

## Abstract

Based on dispersion theory, we present a formalism for a model-independent evaluation of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon. In particular, we comment on the definition of the pion pole in this framework and provide a master formula that relates the effect from ππ intermediate states to the partial waves for the process γ \* γ \* → ππ. All contributions are expressed in terms of on-shell form factors and scattering amplitudes, and as such amenable to an experimental determination.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Particle Physics & Beyond the Standard Model](https://space-kitty.com/topics/particle-physics-bsm)

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