Higgs Boson Production in Association with a Top-Antitop Quark Pair in Next-to-Next-to-Leading Order QCD

Oct 14, 2022
8 pages
Published in:
  • Phys.Rev.Lett. 130 (2023) 11, 111902
  • Published: Mar 16, 2023
e-Print:
Report number:
  • TIF-UNIMI-2022-15,
  • ZU-TH 46/22,
  • MPP-2022-128,
  • PSI-PR-22-30

Citations per year

2022202320242025220281
Abstract: (APS)
The associated production of a Higgs boson with a top-antitop quark pair is a crucial process at the LHC since it allows for a direct measurement of the top-quark Yukawa coupling. We present the computation of the radiative corrections to this process at the next-to-next-to-leading order (NNLO) in QCD perturbation theory. This is the very first computation for a 23 process with massive colored particles at this perturbative order. We develop a soft Higgs boson approximation for loop amplitudes, which enables us to reliably quantify the impact of the yet unknown two-loop contribution. At the center-of-mass energy s=13TeV, the NNLO corrections increase the next-to-leading order result for the total cross section by about 4% and lead to a significant reduction of perturbative uncertainties.
Note:
  • 8 pages, 2 tables, 1 figure. Version published on PRL
  • top: pair production
  • Higgs particle: associated production
  • quantum chromodynamics: perturbation theory
  • higher-order: 2
  • coupling: Yukawa
  • CERN LHC Coll
  • total cross section
  • radiative correction
Loading ...