Drell-Yan plus jet production and BFKL evolution

Abstract

We discuss the Drell-Yan dilepton production using the transverse momentum dependent parton distributions evolved with the Catani-Ciafaloni-Fiorani-Marchesini-Kwieciński (CCFM-K) equations in the single loop approximation. Such equations are obtained assuming angular ordering of emitted partons (coherence) for x ∼ 1 and transverse momentum ordering for x 1. This evolution scheme also contains the Collins-Soper-Sterman (CSS) soft gluon resummation. We make a comparison with a broad class of data on transverse momentum spectra of low mass Drell-Yan dileptons. 1

WG2 Summary: Low-x and Diffraction

“…NLO BFKL results showed a large decorrelation compared to DGLAP results. K. Golec-Biernat proposed the use of the helicity dependence in DY pair-jet correlations that show a larger decorrelation than jet-jet (Mueller-Navelet) correlations [10]. Finally, A. Ramnath showed results on the rapidity evolution of a rapidity separated quark-gluon system, described by JIMWLK evolution in the dense regime that reduces to BFKL when the system becomes dilute [11].…”