Complete Nagy-Soper subtraction for next-to-leading order calculations in QCD

被引：0
作者：
G. Bevilacqua
M. Czakon
M. Kubocz
M. Worek
机构：
[1] RWTH Aachen University,Institut für Theoretische Teilchenphysik und Kosmologie
来源：
Journal of High Energy Physics | / 2013卷
关键词：
Monte Carlo Simulations; NLO Computations;
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摘要：
We extend the Helac-Dipoles package with the implementation of a new subtraction formalism, first introduced by Nagy and Soper in the formulation of an improved parton shower. We discuss a systematic, semi-numerical approach for the evaluation of the integrated subtraction terms for both massless and massive partons, which provides the missing ingredient for a complete implementation. In consequence, the new scheme can now be used as part of a complete NLO QCD calculation for processes with arbitrary parton masses and multiplicities. We assess its overall performance through a detailed comparison with results based on Catani-Seymour subtraction. The importance of random polarization and color sampling of the external partons is also examined.
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