NLO QCD matrix elements + parton showers in e+e- -> hadrons
Abstract
We present a new approach to combine multiple NLO parton-level calculations matched to parton showers into a single inclusive event sample. The method provides a description of hard multi-jet configurations at next-to leading order in the perturbative expansion of QCD, and it is supplemented with the all-orders resummed modelling of jet fragmentation provided by the parton shower. The formal accuracy of this technique is discussed in detail, invoking the example of electron-positron annihilation into hadrons. We focus on the effect of renormalisation scale variations in particular. Comparison with experimental data from LEP underlines that this novel formalism describes data with a theoretical accuracy that has hitherto not been achieved in standard Monte Carlo event generators.
Cite
@article{arxiv.1207.5031,
title = {NLO QCD matrix elements + parton showers in e+e- -> hadrons},
author = {Thomas Gehrmann and Stefan Hoeche and Frank Krauss and Marek Schonherr and Frank Siegert},
journal= {arXiv preprint arXiv:1207.5031},
year = {2013}
}
Comments
19 pages, 8 figures, v2 as published in JHEP