Eur Phys J C Part Fields. 2021;81(11):1008. doi: 10.1140/epjc/s10052-021-09780-8. Epub 2021 Nov 15.

Holographic QCD and the muon anomalous magnetic moment.

The European physical journal. C, Particles and fields

Josef Leutgeb, Jonas Mager, Anton Rebhan

PMID: 34803483 PMCID: PMC8592957 DOI: 10.1140/epjc/s10052-021-09780-8

Abstract

We review the recent progress made in using holographic QCD to study hadronic contributions to the anomalous magnetic moment of the muon, in particular the hadronic light-by-light scattering contribution, where the short-distance constraints associated with the axial anomaly are notoriously difficult to satisfy in hadronic models. This requires the summation of an infinite tower of axial vector mesons, which is naturally present in holographic QCD models, and indeed takes care of the longitudinal short-distance constraint due to Melnikov and Vainshtein. Numerically the results of simple hard-wall holographic QCD models point to larger contributions from axial vector mesons than assumed previously, while the predicted contributions from pseudo-Goldstone bosons agree nicely with data-driven approaches.

© The Author(s) 2021.

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Publication Types

• Journal Article