Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: phenomenological studies for the Tevatron and the LHC

We report on the calculation of the next-to-leading order QCD corrections to the production of top–antitop-quark pairs in association with a hard jet at the Tevatron and at the LHC. Results for integrated and differential cross sections are presented. We find a significant reduction of the scale dep...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2009-02, Vol.59 (3), p.625-646
Main Authors: Dittmaier, S., Uwer, P., Weinzierl, S.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Dependence
Elementary Particles
Exact sciences and technology
Hadrons
Heavy Ions
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Pair production
Physics
Physics and Astronomy
Quantum chromodynamics
Quantum Field Theories
Quantum Field Theory
Quarks
Regular Article - Theoretical Physics
String Theory
The physics of elementary particles and fields
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Summary:We report on the calculation of the next-to-leading order QCD corrections to the production of top–antitop-quark pairs in association with a hard jet at the Tevatron and at the LHC. Results for integrated and differential cross sections are presented. We find a significant reduction of the scale dependence. In most cases the corrections are below 20% indicating that the perturbative expansion is well under control. Moreover, the forward–backward charge asymmetry of the top quark, which is analyzed at the Tevatron, is studied at next-to-leading order. We find large corrections, suggesting that the definition of the observable has to be refined.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-008-0816-y