Multijet events in the k_T-factorisation scheme
Stefan Höche, Frank Krauss, Thomas Teubner
TL;DR
The paper develops a Markovian Monte Carlo framework for multi-jet production in the high-energy, small-x regime using k_T-factorisation. It employs Kimber–Martin–Ryskin–Watt DUPDFs generated from conventional PDFs to act as LL BFKL impact factors and implements a Markov chain of emissions to produce exclusive final states. Quark production is incorporated via a phenomenological ladder vertex, and the approach is benchmarked against DGLAP-reweighted matrix elements, exact off-shell matrix elements, and Tevatron/CDF jet data, with running coupling and kinematic constraints found to be crucial. This work advances a unified description of jet and minijet production at high energy and sets the stage for extensions to MPI, diffraction, and quarkonia within a k_T-factorised framework.
Abstract
A Markovian Monte Carlo algorithm for multi-parton production in the high-energy limit is proposed and the matching with unintegrated parton densities is discussed.