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

Physical Review D

Journal ISSN

2470-0010

Volume

78

First Page

074005

Digital Object Identifier (DOI)

10.1103/PhysRevD.78.074005

Included in

Physics Commons

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