|Title: ||Matching NLO QCD computations and parton shower simulations.|
|Authors: ||Frixione, Stefano|
Webber, Bryan R
|Keywords: ||QCD, NLO Computations, Hadronic Colliders.|
|Issue Date: ||Apr-2002|
|Publisher: ||HEP, Cavendish Laboratory, University of Cambridge|
|Series/Report no.: ||Cavendish-HEP-02-01|
|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 αs; 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 W+W− pairs.|
|Appears in Collections:||Scholarly works - High Energy Physics|
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