539 citations · 3k across the 118 of their papers we have counts for
5 papers · 1 filter
Improving QCD Perturbative Predictions and Transverse Momentum Effects
N. G. Stefanis
I elaborate on the implementation of analyticity of hadronic quantities at the amplitude level and show that it amounts to the extension of Analytic Perturbation Theory of Shirkov…
Tagging the pion quark structure in QCD
A. P. Bakulev, S. V. Mikhailov, N. G. Stefanis
We combine the constraints on the pion quark structure available from perturbative QCD, nonperturbative QCD (nonlocal QCD sum rules and light cone sum rules) with the analysis of c…
QCD Analytic Perturbation Theory. From integer powers to any power of the running coupling
A. P. Bakulev, S. V. Mikhailov, N. G. Stefanis
We propose a new generalized version of the QCD Analytic Perturbation Theory of Shirkov and Solovtsov for the computation of higher-order corrections in inclusive and exclusive pro…
Analyticity properties of three-point functions in QCD beyond leading order
A. P. Bakulev, A. I. Karanikas, N. G. Stefanis
The removal of unphysical singularities in the perturbatively calculable part of the pion form factor--a classic example of a three-point function in QCD--is discussed. Different `…
Renormalization-group improved evolution of the meson distribution amplitude at the two-loop level
Alexander P. Bakulev, N. G. Stefanis
We discuss the two-loop evolution of the flavor-nonsinglet meson distribution amplitude in perturbative QCD. After reviewing previous two-loop computations, we outline the incompat…