We discuss our present knowledge of α s, the fundamental running coupling or effective
charge of Quantum Chromodynamics (QCD). A precise understanding of the running of α s …

A key issue in making precise predictions in QCD is the uncertainty in setting the
renormalization scale μ r and thus determining the correct values of the QCD running …

Abstract This White Paper presents an overview of the current status and future perspective
of QCD research, based on the community inputs and scientific conclusions from the 2022 …

A bstract With current high precision collider data, the reliable estimation of theoretical
uncertainties due to missing higher orders (MHOs) in perturbation theory has become a …

A bstract Using the spectral functions measured in τ decays, we investigate the actual
numerical impact of duality violations on the extraction of the strong coupling. These effects …

The inclusive production of hadrons through electroweak currents can be rigorously
analysed with short-distance theoretical tools. The associated observables are insensitive to …

In addition to the evaluation of high-order loop contributions, the precision and predictive
power of perturbative QCD (pQCD) predictions depends on two important issues:(1) how to …

The intrinsic conformality (iCF) is a general property of the renormalizable gauge theory,
which ensures the scale invariance of a fixed-order series at each perturbative order …

We present scheme-independent calculations of the anomalous dimensions γ ψ¯ ψ, IR and
γ χ¯ χ, IR of fermion bilinear operators ψ¯ ψ and χ¯ χ at an infrared fixed point in an …

A bstract We consider the two-fold expansion in powers of the conformal anomaly and of the
strong coupling α s for the non-singlet contributions to Adler D-function and Bjorken …