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arXiv · 2609.39720

Hadronic light-by-light scattering in AdS/QCD and the muon $g-2$: tensor meson contributions

Jonas Mager·Luigi Cappiello·Josef Leutgeb·Anton Rebhan
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Abstract

We briefly review the predictions of holographic QCD in hard-wall AdS/QCD models for the contribution of pseudoscalars and axial-vector mesons to the hadronic light-by-light amplitude and consequently to the muon anomalous magnetic moment, which allows one to satisfy the Melnikov-Vainshtein constraint in a purely hadronic model. Moreover, we discuss the role of tensor mesons in satisfying the remaining short-distance constraints, and provide details for a minimal model of tensor mesons that turns out to agree remarkably well with available data from BELLE as well as preliminary low-$Q^2$ data from BESIII. In an appendix, we also provide analytical results for the short-distance limits in hQCD and compare with the leading-order OPE result as given by the massless quark loop.

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Jonas Mager, Luigi Cappiello, Josef Leutgeb, Anton Rebhan. 2026-09-30. Hadronic light-by-light scattering in AdS/QCD and the muon $g-2$: tensor meson contributions. https://arxiv.org/abs/2609.39720

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