Pseudoscalar transition form factors and the hadronic light-by-light contribution to the muon g-2

2022/11/08 by Gérardin, Antoine, Guenther, Jana N., Varnhorst, Lukas +1
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2211.04159

Abstract

We report on our progress toward the computation of the π⁰, η and η^′ transition form factors using staggered quarks on N_f=2+1+1 gauge ensembles generated by the Budapest-Marseille-Wuppertal collaboration. These form factors are essential ingredients to evaluate the pseudoscalar-pole contributions to the hadronic light-by-light scattering in the muon g-2. Preliminary results for the pseudoscalar-pole contributions are presented, at finite lattice spacing, for all three light mesons.

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• Pseudoscalar transition form factors and the hadronic light-by-light contribution to the muon g-2
• Pseudoscalar-pole contributions to the muon g-2 at the physical point
• Lattice calculation of the π⁰, η and η^′ transition form factors and the hadronic light-by-light contribution to the muon g-2
• A theoretical study of meson transition form factors
• Study of transition form factors of the lightest pseudoscalars