Efficient Color-Dressed Calculation of Virtual Corrections
| Autor: | Giele, Walter, Kunszt, Zoltan, Winter, Jan |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Nucl.Phys.B840:214-270,2010 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.nuclphysb.2010.07.007 |
| Popis: | With the advent of generalized unitarity and parametric integration techniques, the construction of a generic Next-to-Leading Order Monte Carlo becomes feasible. Such a generator will entail the treatment of QCD color in the amplitudes. We extend the concept of color dressing to one-loop amplitudes, resulting in the formulation of an explicit algorithmic solution for the calculation of arbitrary scattering processes at Next-to-Leading order. The resulting algorithm is of exponential complexity, that is the numerical evaluation time of the virtual corrections grows by a constant multiplicative factor as the number of external partons is increased. To study the properties of the method, we calculate the virtual corrections to $n$-gluon scattering. Comment: 48 pages, 23 figures |
| Databáze: | arXiv |
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