TTP08-31 Automating dipole subtraction

TTP08-31 Automating dipole subtraction

TTP08-31 Automating dipole subtraction

We report on automating the Catani-Seymour dipole subtraction which is a general procedure to treat infrared divergences in real emission processes at next-to-leading order in QCD. The automatization rests on three essential steps: the creation of the dipole terms, the calculation of the color linked squared Born matrix elements, and the evaluation of different helicity amplitudes. The routines have been tested for a number of complex processes, such as the real emission process gg –> t anti-t ggg.

K.Hasegawa, S.Moch, P.Uwer
Nucl.Phys.Proc.Suppl. 183 268-273 2008
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