Top-quark pair-production and decay at high precision
arXiv:1705.08903 · doi:10.1103/PhysRevD.96.051501
Abstract
We present a fully-differential and high-precision calculation of top-quark pair-production and decay at the LHC, providing predictions for observables constructed from top-quark leptonic and -flavoured jet final states. The calculation is implemented in a parton-level Monte Carlo and includes an approximation to the next-to-next-to leading order (NNLO) corrections to the production and, for the first time, the exact NNLO corrections to the decay subprocesses. The corrections beyond NLO are sizeable, and including them is crucial for an accurate description of the cross section constrained by experimental phase-space restrictions. We compare our predictions to published ATLAS and CMS measurements at the LHC, finding improved agreement compared with lower orders in the perturbative expansion.
6 pages, 2 figures, 1 table
References in corpus (13)
- Parton distributions for the LHC
- Parton distributions in the LHC era: MMHT 2014 PDFs
- Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order
- NLO QCD corrections to WWbb production at hadron colliders
- On the NNLO QCD corrections to single-top production at the LHC
- NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders
- An NLO+PS generator for and production and decay including non-resonant and interference effects
- NLO electroweak corrections to off-shell top-antitop production with leptonic decays at the LHC
- Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis at NLO QCD
- Top-quark pair production at hadron colliders: differential cross section and phenomenological applications with DiffTop
- Renormalization-group improved fully differential cross sections for top pair production
- Off-shell effects for t-channel and s-channel single-top production at NLO in QCD
- Determination of the top quark mass from leptonic observables