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Richard Corke, Torbjörn Sjöstrand
Improved Parton Showers at Large Transverse Momenta
Abstract
Several methods to improve the parton-shower description of hard
processes by an injection of matrix-element-based information
have been presented over the years. In this article we study
(re)weighting schemes for the first/hardest emission. One objective
is to provide a consistent matching of the POWHEG next-to-leading
order generator to the Pythia shower algorithms. Another is to
correct the default behaviour of these showers at large transverse
momenta, based on a comparison with real-emission matrix elements.
LU TP 10-07
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