Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP01(2013)144
Keywords
Monte Carlo Simulations; NLO Computations
Categories
Funding
- US Department of Energy [DE-AC02-76SF00515]
- US National Science Foundation [NSF-PHY-0705682]
- Research Executive Agency (REA) of the European Union [PITN-GA-2010-264564]
- German Research Foundation (DFG) [DI 784/2-1]
- Swiss National Science Foundation (SNF) [200020-138206]
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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.
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