6533b7d8fe1ef96bd126b5f9
RESEARCH PRODUCT
Precision predictions for the tt¯ production cross section at hadron colliders
Valentin AhrensMatthias NeubertAndrea FerrogliaLi Lin YangBen D. Pecjaksubject
PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyHadron01 natural sciencesGluonNuclear physicsRenormalizationCross section (physics)Pair production0103 physical sciencesEffective field theoryHigh Energy Physics::ExperimentLimit (mathematics)Resummation010306 general physicsdescription
Abstract We make use of recent results in effective theory and higher-order perturbative calculations to improve the theoretical predictions of the top-quark pair production cross section at hadron colliders. In particular, we supplement the fixed-order NLO calculation with higher-order corrections from soft gluon resummation at NNLL accuracy. Uncertainties due to power corrections to the soft limit are estimated by combining results from single-particle inclusive and pair invariant-mass kinematics. We present our predictions as functions of the top-quark mass in both the pole scheme and the M S ¯ scheme. We also discuss the merits of using threshold masses as an alternative, and calculate the cross section with the top-quark mass defined in the 1S scheme as an illustrative example.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-09-01 | Physics Letters B |