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

Michael Krämer·Stephen Mrenna·Davison E. Soper
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Abstract

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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Michael Krämer, Stephen Mrenna, Davison E. Soper. 2005-09-13. Next-to-leading order QCD jet production with parton showers and hadronization. https://doi.org/10.1103/physrevd.73.014022

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