Top-quark pair-production and decay at high precision

Autor:	Gao, Jun, Papanastasiou, Andrew S.
Rok vydání:	2017
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment
Zdroj:	Phys. Rev. D 96, 051501 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.96.051501
Popis:	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 $b$-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. Comment: 6 pages, 2 figures, 1 table
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1705.08903 Zobrazit plný text záznamu View this record from Arxiv