?0, ?, ?' two-photon transition form factors in the holographic soft-wall model and contributions to (g-2)?

We compute the two-photon transition form factors of the light pseudoscalar pi 0, eta and eta' mesons in a soft-wall holographic model of QCD with a solution of the U (1)A problem. We compare the results with the experimental data in different ranges of photon virtualities. The obtained transition form factors are used to determine the pi 0, eta and eta' pole terms in the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

Automated summary

The two-photon transition form factors of light pseudoscalar pi 0, eta and eta' mesons in a soft-wall holographic model of QCD with a solution of the U(1)A problem were computed. The results were compared with experimental data in different ranges of photon virtualities. The obtained transition form factors were used to determine the pi 0, eta, and eta' pole terms in the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon.