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 …

Lepton scattering is an established ideal tool for studying inner structure of small particles
such as nucleons as well as nuclei. As a future high energy nuclear physics project, an …

We present a systematic analysis in perturbative quantum chromodynamics (QCD) of large-
momentum-transfer exclusive processes. Predictions are given for the scaling behavior …

We present a detailed analysis of e+ e−→ π+ π− data up to s= 1 GeV in the framework of
dispersion relations. Starting from a family of ππ P-wave phase shifts, as derived from a …

A bstract While the low-energy part of the hadronic light-by-light (HLbL) tensor can be
constrained from data using dispersion relations, for a full evaluation of its contribution to 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 …

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 widely used nonperturbative wave functions and distribution functions of QCD are
determined as matrix elements of light‐ray operators. These operators appear as large …

In recent years light-cone quantization of quantum field theory has emerged as a promising
method for solving problems in the strong coupling regime. The approach has a number of …

We give an overview of the theory for generalized parton distributions. Topics covered are
their general properties and physical interpretation, the possibility to explore the three …