München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 11: QCD (Theorie) 1

T 11.6: Talk

Monday, March 9, 2009, 18:15–18:30, M109

NLO QCD calculations using an alternative subtraction scheme — •Cheng-Han Chung, Michael Krämer, and Tania Robens — Institut fuer Theoretische Physik E, RWTH Aachen*, D - 52056 Aachen, Germany

For the LHC we will need precise calculations for multi-particle processes; therefore, processes have in general to be calculated at least to NLO precision. The standard subtraction schemes which are used to regularize the infrared divergencies in NLO calculations become numerically inefficient if the number of external legs is increased. We employ an alternative subtraction scheme using Nagy and Soper dipoles, in which the number of dipole calculations is greatly reduced with respect to standard subtraction schemes, for the calculation of NLO QCD and electroweak processes at the LHC and lepton colliders. We compare to results which were obtained using standard dipole subtraction.