Small$-x$ Resummation Effects in Electroweak Processes

Abstract

We investigate small$-x$ resummation effects in QCD coefficient functions for $Z_{0}g$ and $Wg$ fusion processes, and we compare them with the known ones of $\gamma g$ type. We find a strong process dependence, that we argue to be due to the possible presence of collinear singularities for either small or large $\k$ of the exchanged gluon. For top quark production, we find that the $gg\ra t\bar{t}$ and $Z_0g\ra t\bar{t}$ channels have larger resummation enhancements than the $Wg\ra t\bar{t}$ one.

28 pages, latex, 3 figures appended as uuencoded file

References in corpus (5)

• High-Energy Factorization and Small-X Deep Inelastic Scattering Beyond Leading Order
• A Measurement of the Proton Structure Function $F_2(x,Q^2)$
• Summation of Leading Logarithms at Small x
• QCD Scaling Violation at Small x
• Kt-Factorization vs. Renormalization Group: A small-x Consistency Argument

Cited by in corpus (7)

• Non Abelian $q\bar{q}$ contributions to small-$x$ anomalous dimensions
• k-Factorization and Small-x Anomalous Dimensions
• k-Factorization and Impact Factors at Next-to-leading Level
• Virtual Next-to-Leading Corrections to the Impact Factors in the High-Energy Limit
• Comparison of $k_T$-Factorization Approach and QCD Parton Model for Charm and Beauty Hadroproduction
• Heavy Quark Hadroproduction in $k_T$-Factorization Approach with Unintegrated Gluon Distributions
• Charm Hadroproduction in $k_T$-Factorization Approach