Paper
QCD Matrix Elements + Parton Showers
Authors
S. Catani, F. Krauss, R. Kuhn, B. R. Webber
Abstract
We propose a method for combining QCD matrix elements and parton showers in Monte Carlo simulations of hadronic final states in annihilation. The matrix element and parton shower domains are separated at some value of the jet resolution, defined according to the -clustering algorithm. The matrix elements are modified by Sudakov form factors and the parton showers are subjected to a veto procedure to cancel dependence on to next-to-leading logarithmic accuracy. The method provides a leading-order description of hard multi-jet configurations together with jet fragmentation, while avoiding the most serious problems of double counting. We present first results of an approximate implementation using the event generator APACIC++.