Eur. Phys. J. Spec. Top. (2021) 230: 2699-2709
https://doi.org/10.1140/epjs/s11734-021-00258-y

Regular Article

Yang–Mills at strong vs. weak coupling

Renormalons, OPE and all that

William I. Fine Theoretical Physics Institute, University of Minnesota, 55455, Minneapolis, MN, USA

^a shifman@umn.edu

Received: 25 May 2021
Accepted: 26 July 2021
Published online: 5 August 2021

Abstract

I discuss various situations in which perturbative expansions are used in Yang–Mills theories with asymptotic freedom and establish the limits of its applicability.