Department
Physics
Document Type
Article
Publication Date
10-2008
Embargo Period
8-31-2017
Abstract
We present results for the top quark pair cross section at the Tevatron and the LHC. We use the resummed double differential cross section, employing the fully kinematics-dependent soft-anomalous-dimension matrices, to calculate the soft-gluon contributions at next-to-next-to-leading order (NNLO). We improve and update our previous estimates by refining our methods, including further subleading terms, and employing the most recent parton distribution function sets. The NNLO soft corrections significantly enhance the NLO cross section while considerably reducing the scale dependence. We provide a detailed discussion of all theoretical uncertainties in our calculation, including kinematics, scale, and parton distribution uncertainties, and clarify the differences between our work and other approaches in the literature.
Journal Title
Physical Review D
Journal ISSN
2470-0010
Volume
78
First Page
074005
Digital Object Identifier (DOI)
10.1103/PhysRevD.78.074005