One-loop gg→ bb effects in the main irreducible background to exclusive H→ bb production at the LHC

2008/06/09 by A. G. Shuvaev, V. A. Khoze, A. D. Martin +1
Mathematics · Physics and Astronomy · #Amplitude #Bar (unit) #Black Holes and Theoretical Physics #Combinatorics #Gluon #High-Energy Particle Collisions Research #Large Hadron Collider #Loop (graph theory) #Mathematics #Optics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum chromodynamics #Radiative transfer #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-008-0675-6

published as Eur.Phys.J.C56:467-477,2008 · 24 pages, 5 figures

arxiv created 2008/06/09 · openalex publication_date 2008/07/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We calculate the amplitude of gg->bb(bar) production for the colour singlet, J_z=0 di-gluon state at O(α_S²) order. We consider the cancellation, and a realistic cutoff, of the infrared divergent terms. We show that the one-loop radiative QCD contributions effectively reduce the Born level result for the central exclusive bb(bar) cross section at the LHC. This process is essentially the only irreducible QCD background to the exclusive H->bb(bar) signal.

Citations

• Soft diffraction at the LHC: a partonic interpretation
• On radiative QCD backgrounds to exclusive H→bb production at the LHC and a photon collider
• THE FP420 R&D PROJECT AT THE LHC
• Double-diffractive processes in high-resolution missing-mass experiments at the Tevatron
• Prospects for new physics observations in diffractive processes at the LHC and Tevatron