Parton-shower uncertainties with Herwig 7: benchmarks at leading order

被引：0
|
作者：
Johannes Bellm
Graeme Nail
Simon Plätzer
Peter Schichtel
Andrzej Siódmok
机构：
[1] Durham University,Department of Physics, IPPP
[2] University of Manchester,Particle Physics Group, School of Physics and Astronomy
[3] Karlsruhe Institute of Technology,Institute for Theoretical Physics
[4] CERN,TH Department
[5] Polish Academy of Sciences,The Henryk Niewodniczanski Institute of Nuclear Physics in Cracow
来源：
The European Physical Journal C | 2016年 / 76卷
关键词：
Transverse Momentum; Parton Shower; Hard Process; Hard Scale; Parton Distribution Function;
D O I：
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中图分类号：
学科分类号：
摘要：
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.
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