6533b86efe1ef96bd12cca29
RESEARCH PRODUCT
Soft-gluon resummation for boosted top-quark production at hadron colliders
Ben D. PecjakAndrea FerrogliaLi Lin Yangsubject
Scattering cross-sectionPhysicsNuclear and High Energy PhysicsParticle physicsTop quarkLogarithm010308 nuclear & particles physicsHadronHigh Energy Physics::PhenomenologyFOS: Physical sciences01 natural sciencesGluonNuclear physicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Factorization0103 physical sciencesInvariant massHigh Energy Physics::ExperimentResummation010306 general physicsdescription
We investigate the production of highly energetic top-quark pairs at hadron colliders, focusing on the case where the invariant mass of the pair is much larger than the mass of the top quark. In particular, we set up a factorization formalism appropriate for describing the differential partonic cross section in the double soft and small-mass limit, and explain how to resum simultaneously logarithmic corrections arising from soft gluon emission and from the ratio of the pair-invariant mass to that of the top quark to next-to-next-to-leading logarithmic accuracy. We explore the implications of our results on approximate next-to-next-to-leading order formulas for the differential cross section in the soft limit, pointing out that they offer a simplified calculational procedure for determining the currently unknown delta-function terms in the limit of high invariant mass.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-05-16 |