1997/12/02 by B.R. Webber, B. R. Webber
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0920-5632(98)00325-9
published as Nucl.Phys.Proc.Suppl. 71 (1999) 66-75 · 17 pages, LaTeX, 5 figures, uses epsfig. Talk at XXVII International Symposium on Multiparticle Dynamics, Frascati, Italy, 8-12 September 1997
arxiv created 1997/12/02 · openalex publication_date 1999/03/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The `renormalon' or `dispersive' method for estimating non-perturbative corrections to QCD observables is reviewed. The corrections are power-suppressed, i.e. of the form A/Qp where Q is the hard process momentum scale. The renormalon method exploits the connection between divergences of the QCD perturbation series and low-momentum dynamics to predict the power, p. The further assumption of an approximately universal low-energy effective strong coupling leads to relationships between the coefficients A for different observables. Results on 1/Q2 corrections to deep inelastic structure functions and 1/Q corrections to event shapes are presented and compared with experiment. Shape variables that could be free of 1/Q and \as(Q2)/Q corrections are suggested.