2009/09/12 by Qing-Hong Cao, Cao, Qing-Hong, Chuan-Ren Chen +7
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.0909.2305
openalex publication_date 2009/09/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The search for the Higgs boson at the Tevatron and the LHC relies on detailed calculations of the kinematics of Higgs boson production and decay. In this paper, we improve the calculation of the distribution in transverse momentum, QT, of the Higgs boson in the gluon fusion production process, gg→ H, by matching the resummed distribution at small QT with the \cal O(αs4) fixed-order perturbative calculation at high QT in the ResBos Monte Carlo program. The distribution is higher at large QT than with the old \cal O(αs3) fixed-order perturbative calculation, and the matching with the resummed calculation is much smoother. The total cross section is also increased, more in line with next-to-next-to-leading-order calculations. We also study the effect of the new calculation on the distribution of Δϕℓℓ in the overall process gg→ H→ W+ W-→ℓ+ℓ-νν, and the effect of PDF uncertainties on the distributions at the Tevatron and the LHC.