NLO QCD corrections to top quark pair production in association with one hard jet at hadron colliders
By K. Melnikov, M. Schulze. 2010
146 citations recorded by the source corpus.
Abstract We compute the QCD corrections to the production of a t t ¯ pair in association with one hard jet at the Tevatron and the LHC, using the method of generalized D-dimensional unitarity. Top quark decays are included at leading order in perturbative QCD. We present kinematic distributions of top quark decay products in lepton plus jets and dilepton final states at the Tevatron and the LHC, using realistic selection cuts. We confirm a strong reduction of the top quark forward–backward asymmetry in p p ¯ → t t ¯ j at next-to-leading order, first observed by Dittmaier, Uwer and Weinzierl. We argue that there is a natural way to understand this reduction and that it does not imply a breakdown of the perturbative expansion for the asymmetry.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/db454dfe5822fe8ee2f56364dcdae664a266df56
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Nuclear and High Energy Physics
- Valentin Hirschi
- Fabio Maltoni
- R. Frederix
- Atlas Collaboration
- Cms Collaboration
- Ansgar Denner
- Stefano Frixione
- Stefan Dittmaier
Citations in the corpus
- Hadronic top-quark pair-production with one jet and parton showering (2011, methodology): “Several studies following this approach h ave already been presented, concerning both tt̄ production [59] with spin correlations at NLO and the tt̄ j case [20] with spin correlations accounted for at leading order.”
- Automation of one-loop QCD computations (2011, result): “Recently the results of this calculation have been verified by HELAC-1Loop [47] and by Melnikov and Schultze [48].”
- Scattering amplitudes from unitarity-based reduction algorithm at the integrand-level (2010, methodology): “trained by the cut-conditions. – 6 – 2.2.2 Quintuple Cut The residue of the quintuple-cut, D¯ i = ... = D¯m = 0, defined as, ∆ijkℓm(¯q) = Resijkℓm ( N(¯q) D¯ 0 ···D¯n−1 ) (2.11) can be parametrized as [99], ∆ijkℓm(¯q) = c (ijkℓm) 5,0 µ 2 . (2.12) 2.2.3 Quadruple Cut The residue of the quadruple-cut, ”
- Integrand reduction of one-loop scattering amplitudes through Laurent series expansion (2012, background): “2 in the numerator. The latter can be traded with higher dimensional integrals [40,41] Ii1···ik[(µ 2)rf(q,µ2)] = 1 πr Yr κ=1 κ −3 + d 2 Z dd+2rq¯ f(q,µ2) Di1 ···Di k . (2.18) As already noticed in [42], eq. (2.16) is free of scalar pentagons. 3. Reductionalgorithm The one loop amplitude is complete”
- Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order (2010, methodology): “perfectly be explained using the same arguments as in the TeVatron case, namely the on-shell top and W boson approximation applied in [ 8 ] and small differences between individual setups.”