Perturbative QCD and Power Corrections

TL;DR

The paper addresses how genuine confinement effects manifest in hard-process multi-hadron production by leveraging perturbative QCD with log resummations (MLLA) and coherence-induced angular ordering to describe jet evolution. It demonstrates that the time-like evolution yields predictive inclusive energy spectra shapes that are largely independent of nonperturbative normalization, via the limiting spectrum and local parton-hadron duality (LPHD). The LPHD framework provides a bridge from parton-level distributions to hadron-level spectra with a universal conversion constant, a viewpoint supported by LEP-I, DIS, and Tevatron data. Overall, the work argues for a coherent, perturbative-based description of hadronization effects in jets, reinforcing the role of coherence and LPHD in QCD phenomenology.

Abstract

A short review is given of the present status of the studies of genuine confinement effects in multiple hadron production in hard processes