Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1852325 | Physics Letters B | 2008 | 4 Pages |
Abstract
We present a calculation of the full next-to-leading order QCD corrections to the scattering process ppâtt¯Z. This channel will be used to measure the tt¯Z electroweak couplings at the Large Hadron Collider. These couplings cannot be directly measured in current experiments. To obtain these results, we utilize a novel, completely numerical approach to performing higher order QCD calculations. We find that for reasonable values of the renormalization and factorization scales the QCD corrections increase the leading order result by 35%, while reducing the theoretical error arising from uncalculated higher order corrections to approximately ±10%.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Achilleas Lazopoulos, Thomas McElmurry, Kirill Melnikov, Frank Petriello,