6533b82afe1ef96bd128bfbe
RESEARCH PRODUCT
Threshold expansion at order αs4 for the tt¯ invariant mass distribution at hadron colliders
Valentin AhrensMatthias NeubertAndrea FerrogliaBen D. PecjakLi Lin Yangsubject
PhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderMass distributionHigh Energy Physics::PhenomenologyHadronTevatronNuclear physicsDistribution (mathematics)High Energy Physics::ExperimentInvariant massCenter of massInvariant (mathematics)description
Abstract We calculate the leading O ( α s 4 ) contributions to the invariant mass distribution of top-quark pairs produced at the Tevatron and LHC, in the limit where the invariant mass of the t t ¯ pair approaches the partonic center-of-mass energy. Our results determine at NNLO in α s the coefficients of all singular plus distributions and scale-dependent logarithms in the differential partonic cross sections for q q ¯ , g g → t t ¯ + X . A numerical analysis showing the effects of the NNLO corrections on the central values and scale dependence of the invariant mass distribution is performed. The NNLO corrections are found to significantly enhance the cross section and reduce the perturbative uncertainties compared to the NLO calculation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-04-01 | Physics Letters B |