https://doi.org/10.1051/epjconf/202227000029
Hadronic ligh-by-light contribution to the anomalous magnetic moment of the muon: The role of scalar resonances in a holographic model of QCD
1 Dipartimento di Fisica “Ettore Pancini”, Universitá di Napoli ’Federico II’, Via Cintia, 80126 Napoli, Italy
2 INFN-Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Via Cintia, Edificio 6, 80126 Napoli, Italy
* e-mail: luigi.cappiello@na.infn.it
Published online: 17 November 2022
We review the evaluation of scalar mesons contribution to the hadronic light-by-light piece of the muon anomalous magnetic moment, using a holographic model of QCD.We evaluate the contributions of the lightest, sub-GeV scalars σ(500), a0(980) and f0(980) and their associated towers of excited states. Our results point at a negative contribution, overwhelmingly dominated by the σ(500) meson, that we estimate at aμHLbL,S = -9(2)·10-11, in very good agreement with recent determinations from dispersive analyses.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
