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Parton Shower Uncertainties with Herwig 7: Benchmarks at Leading Order (1605.01338v1)
Published 4 May 2016 in hep-ph
Abstract: We perform a detailed study of the sources of perturbative uncertainty in parton shower predictions within the Herwig 7 event generator. We benchmark two rather different parton shower algorithms, based on angular-ordered and dipole-type evolution, against each other. We deliberately choose leading order plus parton shower as the benchmark setting to identify a controllable set of uncertainties. This will enable us to reliably assess improvements by higher-order contributions in a follow-up work.