Reweighting QCD matrix-element and parton-shower calculations

ISSN
1434-6052
1434-6044
Date Issued
2016
Author(s)
Schonherr, Marek
DOI
10.1140/epjc/s10052-016-4430-0
Abstract
We present the implementation and validation of the techniques used to efficiently evaluate parametric and perturbative theoretical uncertainties in matrix-element plus parton-shower simulations within the Sherpa event-generator framework. By tracing the full as and PDF dependences, including the parton-shower component, as well as the fixed-order scale uncertainties, we compute variational event weights on-the-fly, thereby greatly reducing the computational costs to obtain theoretical-uncertainty estimates.
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