Production and decay of the Higgs boson in association with top quarks

2021/11/30 by Daniel Stremmer, Małgorzata Worek, Malgorzata Worek
Physics and Astronomy · #Boson #Feynman diagram #Gauge (firearms) #Gauge boson #Gauge theory #Hadron #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Mathematical physics #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Standard Model (mathematical formulation) #Top quark #hep-ex #hep-ph

paper · pdf · doi:10.1007/jhep02(2022)196

published as JHEP 02 (2022) 196 · 41 pages, 16 Figures, 6 Tables, version to appear in JHEP

openalex publication_date 2022/02/01 · arxiv created 2022/02/08 · arxiv updated 2022/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report on the calculation of the next-lo-leading order QCD corrections to Higgs boson production and decay in association with top quarks. We consider leptonic decays of top quarks leading to the hadronic process pp→ e⁺ν_e μ^-ν_μ bb H (H→ X) at the LHC with √(s)=13 TeV. All resonant as well as non-resonant Feynman diagrams, interferences and off-shell effects are included for the top quark and W gauge boson. Decays of the Higgs boson, on the other hand, are included in the narrow-width-approximation. Specifically, we consider Higgs boson decays into bb, τ⁺τ^-, γγ and e⁺e^-e⁺e^-. Numerical results are given at the integrated and differential fiducial level for various factorisation and renormalisation scale choices and different PDF sets. We study the main theoretical uncertainties that are associated with neglected higher order terms in the perturbative expansion and with different parametrisations of the PDFs. Furthermore, we examine the size of the off-shell effects by an explicit comparison to the calculation in the full narrow-width-approximation. Finally, the impact of the contributions induced by the bottom-quark parton density is investigated.

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