We review the present status of the Standard Model calculation of the anomalous magnetic
moment of the muon. This is performed in a perturbative expansion in the fine-structure …

We highlight the progress, current status, and open challenges of QCD-driven physics, in
theory and in experiment. We discuss how the strong interaction is intimately connected to a …

We present a lattice QCD calculation of the double-virtual neutral pion transition form factor,
with the goal to cover the kinematic range relevant to hadronic light-by-light scattering in the …

The pion-pole contribution to hadronic light-by-light scattering in the anomalous magnetic
moment of the muon (g− 2) μ is fully determined by the doubly-virtual pion transition form …

At the dawn of a new decade, particle physics faces the challenge of explaining the mystery
of dark matter, the origin of matter over antimatter in the Universe, the apparent fine-tuning of …

Decays of the neutral and long-lived η and η′ mesons provide a unique, flavor-conserving
laboratory to test low-energy Quantum Chromodynamics and search for new physics …

The π 0 pole constitutes the lowest-lying singularity of the hadronic light-by-light (HLBL)
tensor, and thus, it provides the leading contribution in a dispersive approach to HLBL …

We explore the sensitivity of photon-beam experiments to axionlike particles (ALPs) with
QCD-scale masses whose dominant coupling to the standard model is either to photons or …

Nucleons (protons and neutrons) are the building blocks of atomic nuclei and are
responsible for more than 99% of the visible matter in the Universe. Despite decades of …

The last five years have brought considerable progress in the study of the bound-state
problem in continuum quantum field theory. We highlight a subset of that progress; viz., that …