Next-to-leading order QCD jet production with parton showers and hadronization

Details Next-to-leading order QCD jet production with parton showers and hadronization Next-to-leading order QCD jet production with parton showers and hadronization

2005-09-13

arxiv.org/abs/hep-ph/0509127v1

Phys.Rev.D73:014022,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 12 figures

Scientific paper

10.1103/PhysRevD.73.014022

We report on a method for matching the next-to-leading order calculation of QCD jet production in e+e- annihilation with a Monte Carlo parton shower event generator (MC) to produce realistic final states. The final result is accurate to next-to-leading order (NLO) for infrared-safe one-scale quantities, such as the Durham 3-jet fraction y_3, and agrees well with parton shower results for multi-scale quantities, such as the jet mass distribution in 3-jet events. For our numerical results, the NLO calculation is matched to the event generator Pythia, though the method is more general. We compare one scale and multi-scale quantities from pure NLO, pure MC, and matched NLO-MC calculations.

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