paper

Matching NLO QCD computations and parton shower simulations

arXiv:hep-ph/0204244 · doi:10.1088/1126-6708/2002/06/029

Abstract

We propose a method for matching the next-to-leading order (NLO) calculation of a given QCD process with a parton shower Monte Carlo (MC) simulation. The method has the following features: fully exclusive events are generated, with hadronization according to the MC model; total exclusive rates are accurate to NLO; NLO results for distributions are recovered upon expansion in ; hard emissions are treated as in NLO computations while soft/collinear emissions are handled by the MC simulation, with the same logarithmic accuracy as the MC; and matching between the hard- and soft/collinear-emission regions is smooth. A fraction of events with negative weight is generated, but unweighting remains possible with reasonable efficiency. The method is clarified using a simple toy model, and illustrated by application to the hadroproduction of WW pairs.

69 pages Latex; 16 figures included. Minor modifications to the text, three references added

References in corpus (10)

Cited by in corpus (1183)