Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 12: QCD (Theorie) 2

T 12.5: Talk

Wednesday, February 29, 2012, 17:45–18:00, VG 3.103

Numerical QCD methods at NLO — •Daniel Götz — Institut für Physik (THEP), Johannes Gutenberg-Universität Mainz, Germany

In this talk, a numerical method for the computation of QCD corrections at next-to-leading order accuracy is presented. The algorithm employs the dipole subtraction method for the real contribution; for the virtual contribution, appropriate approximations of the soft, collinear and ultraviolet singularities are subtracted from the one-loop integrand in order to render it finite. To avoid singularities from configurations where a loop momentum goes on-shell, a suitable method for deforming the integration contour is included. The algorithm is formulated at the level of amplitudes, which are computed using color decomposition and recursion relations. In this talk, results for jet rates in electron-positron annihilation up to seven jets are presented; the results for six and seven jets are new.