2013

New and Old about Renormalons: in Memoriam Kolya Uraltsev

Shifman, M.

Understand

I summarize what we know of renormalons from the 1970s and 80s: their uses and theoretical status.

  • It is emphasized that renormalons in QCD are closely related to the Wilsonean operator product expansion (OPE) - a setup ideally suited for dealing with the factorially divergent series reflecting infrared dynamics.
  • I discuss a breakthrough proposal due to Uraltsev et al.
  • to use renormalons to evaluate nonperturbative (power) corrections in the processes without OPE.

Reading the bibliography…