https://doi.org/10.1140/epjc/s10052-016-4430-0
Special Article - Tools for Experiment and Theory
Reweighting QCD matrix-element and parton-shower calculations
1
II. Physikalisches Institut, Universität Göttingen, 37077, Göttingen, Germany
2
Physik-Institut, Universität Zürich, 8057, Zürich, Switzerland
* e-mail: enrico.bothmann@phys.uni-goettingen.de
Received:
6
July
2016
Accepted:
10
October
2016
Published online:
28
October
2016
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 
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.
© The Author(s), 2016
