Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 10: QCD (Theorie) I
T 10.7: Vortrag
Montag, 15. März 2010, 18:15–18:30, HG XVI
Contributions to the NNLO differential cross section in ttbar production — •Valentin Ahrens, Andrea Ferroglia, Mathias Neubert, Ben Pecjack, and Lilin Yang — Institut für Physik (WA THEP), Johannes-Gutenberg-Universität, 55099 Mainz
The calculation of the O(αs4) contributions to the ttbar invariant mass distribution at hadron colliders is addressed in this talk. The results determine at NNLO in αs the coefficients of all singular plus distributions and µ-dependent logarithms in the differential partonic cross section, in the limit where the invariant mass of the ttbar pair approaches the partonic center-of-mass energy. We give a numerical analysis of the effect of the NNLO corrections.