Power corrections and renormalons in DrellYan production
Abstract
The resummed DrellYan cross section in the doublelogarithmic approximation suffers from infrared renormalons. Their presence was interpreted as an indication for nonperturbative corrections of order Λ_{QCD}/( Q(1  z)). We find that, once soft gluon emission is accurately taken into account, the leading renormalon divergence is cancelled by higherorder perturbative contributions in the exponent of the resummed cross section. From this evidence, "higher twist" corrections to the hard cross section in DrellYan production should intervene only at order Λ^{2}_{QCD}/( Q^{2}(1  z) ^{2}) in the entire perturbative domain Q(1  z) > Λ_{QCD}. We compare this result with hadronic event shape variables, comment on the potential universality of nonperturbative corrections to resummed cross sections, and on possible implications for phenomenology.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1995
 DOI:
 10.1016/05503213(95)00439Y
 arXiv:
 arXiv:hepph/9506452
 Bibcode:
 1995NuPhB.454..253B
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 37 pages, LATEX, 3 figures as uudecoded file