Pion structure: from nonlocal condensates to NLO analytic perturbation theory

N. G. Stefanis, A. P. Bakulev, S. V. Mikhailov +2

A pion distribution amplitude, derived from nonlocal QCD sum rules, has been employed to calculate $F_{{\gamma }^{\ast }\gamma \to \pi }(Q^2)$ using light-cone sum rules, and $F_{\pi }(Q^2)$ in NLO QCD perturb…