Physics impact of ILC Higgs coupling measurements: The effect of theory uncertainties

2006/12/31 by Andrew Droll, Heather E. Logan · 1 citation
Physics and Astronomy · #Collider #Coupling (piping) #Energy (signal processing) #Gauge (firearms) #Higgs boson #High-Energy Particle Collisions Research #International Linear Collider #Minimal Supersymmetric Standard Model #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Standard Model (mathematical formulation) #hep-ph

paper · pdf · doi:10.1103/physrevd.76.015001

published as Phys.Rev.D76:015001,2007 · 39 pages, 7 figures. v2: bug fixed in program, conclusions changed

arxiv created 2007/05/18 · openalex publication_date 2007/07/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the effect of theoretical and parametric uncertainties on the ability of future Higgs coupling measurements at the International Linear Collider (ILC) to reveal deviations from the standard model (SM). To quantify the impact of these uncertainties we plot \ensuremathΔ\ensuremathχ²=25 contours for the deviations between the SM Higgs couplings and the light Higgs couplings in the m_h^max benchmark scenario of the minimal supersymmetric standard model (MSSM). We consider the theoretical uncertainties in the SM Higgs decay partial widths and production cross section and the parametric uncertainties in the bottom and charm masses and the strong coupling \ensuremathα_s. We find that the impact of the theoretical and parametric uncertainties is moderate in the first phase of ILC data-taking (500 fb^\ensuremath-1 at 350 GeV center-of-mass energy), reducing the reach in the CP-odd MSSM Higgs mass M_A by about 10% to \ensuremath∼500 GeV, while in the second phase (1000 fb^\ensuremath-1 at 1000 GeV) these uncertainties are larger than the experimental uncertainties and reduce the reach in M_A by about a factor of 2, from \ensuremath∼1200 down to \ensuremath∼600 GeV. The bulk of the effect comes from the parametric uncertainties in m_b and \ensuremathα_s, followed by the theoretical uncertainty in \ensuremathΓ_b.

Citations

• Two loopO(Nfα2s) corrections to the decay width of the Higgs boson to two massive fermions
• Four-loop moments of the heavy quark vacuum polarization function in perturbative QCD
• Charm quark mass from inclusive semileptonic B decays
• Higgs boson production cross section as a precision observable?
• A precise determination of the charm quark's mass in quenched QCD
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Precise predictions for the Higgs-boson decayH→WW/ZZ→4leptons

Cited by

• Two-loop electroweak corrections to the A0γγ and A0gg couplings of the CP-odd Higgs boson