2013/08/31 by G. Bevilacqua, M. Czakon, M. Kubocz +1 · 2 citations
Physics and Astronomy · #Background subtraction #High-Energy Particle Collisions Research #Massless particle #Particle physics theoretical and experimental studies #Parton #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Subtraction #hep-ph
paper · pdf · doi:10.1007/jhep10(2013)204
published as JHEP 1310 (2013) 204 · 37 pages, 8 tables, 3 figures. References added, version to appear in JHEP
openalex publication_date 2013/10/01 · arxiv created 2013/11/01 · arxiv updated 2013/11/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.