Matching Parton Showers and Matrix Elements

Abstract

We compare different procedures for combining fixed-order tree-level matrix element generators with parton showers. We use the case of W-production at the Tevatron and the LHC to compare different implementations of the so-called CKKW scheme and one based on the so-called MLM scheme using different matrix element generators and different parton cascades. We find that although similar results are obtained in all cases, there are important differences.

Comments: Proceedings of the "HERA and the LHC" workshop, CERN/DESY 2004/2005