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Combining QCD Matrix Elements at Next-to-Leading Order with Parton Showers in Electroproduction

B. Pötter
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Abstract

We present a method to combine next-to-leading order (NLO) matrix elements in QCD with leading logarithmic parton showers by applying a suitably modified version of the phase-space-slicing method. The method consists of subsuming the NLO corrections into a scale-dependent phase-space-slicing parameter, which is then automatically adjusted to cut out the leading order, virtual, soft and collinear contributions in the matrix element calculation. In this way a positive NLO weight is obtained, which can be redistributed by a parton shower algortihm. As an example, we display the method for single-jet inclusive cross sections at O(alpha_s) in electroproduction. We numerically compare the modified version of the phase-space-slicing method with the standard approach and find very good agreement on the percent level.

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B. Pötter. 2001-01-08. Combining QCD Matrix Elements at Next-to-Leading Order with Parton Showers in Electroproduction. https://doi.org/10.1103/physrevd.63.114017

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