Improving Higgs coupling measurements through ZZ Fusion at the ILC

Abstract

We evaluate the $e^{-}{e}^{+}\to e^{-}{e}^{+}+h$ process through the $ZZ$ fusion channel at the International Linear Collider (ILC) operating at $500$ GeV and $1$ TeV center of mass energies. We perform realistic simulations on the signal process and background processes. With judicious kinematic cuts, we find that the inclusive cross section can be measured to $2.9\%$ after combining the $500$ GeV at $500{\text{fb}}^{-1}$ and $1$ TeV at $1{\text{ab}}^{-1}$ runs. A multivariate log-likelihood analysis further improves the precision of the cross section measurement to $2.3\%$. We discuss the overall improvement to model-independent Higgs width and coupling determinations and demonstrate the use of different channels in distinguishing new physics effects in Higgs physics. Our study demonstrates the importance of the $ZZ$ fusion channel to Higgs precision physics, which has often been neglected in the literature.

arXiv comment20 pages, 7 figures; v2: version to appear in PRD

References in corpus (40)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Dimension-Six Terms in the Standard Model Lagrangian
• The Strongly-Interacting Light Higgs
• WHIZARD: Simulating Multi-Particle Processes at LHC and ILC
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Effective Lagrangian for a light Higgs-like scalar
• Inadequacy of zero-width approximation for a light Higgs boson signal
• Testing Electroweak Baryogenesis with Future Colliders
• Extracting Higgs boson couplings from LHC data
• Folded Supersymmetry and the LEP Paradox
• Constraining the Higgs boson width with ZZ production at the LHC
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Bounding the Higgs width at the LHC using full analytic results for gg -> 2e 2μ
• Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
• Model-independent precision constraints on dimension-6 operators
• Higgs Working Group Report of the Snowmass 2013 Community Planning Study
• Anomalous Higgs Boson Production and Decay
• Neutral Naturalness from the Orbifold Higgs
• Effects of genuine dimension-six Higgs operators
• Vices and Virtues of Higgs EFTs at Large Energy
• LHC HXSWG interim recommendations to explore the coupling structure of a Higgs-like particle
• Bounding the Higgs Boson Width Through Interferometry
• Taming the off-shell Higgs boson
• Precision Higgsstrahlung as a Probe of New Physics
• Bounding the Higgs width at the LHC: complementary results from $H\to WW$
• Coupling spans of the Higgs-like boson
• Shift in the LHC Higgs diphoton mass peak from interference with background
• Total Width of 125 GeV Higgs Boson
• CP-violating ZZh Coupling at e+e- Linear Colliders
• Anomalous Higgs couplings in angular asymmetries of H --> Zl+l- and e+e- --> HZ
• Inadequacy of zero-width approximation for a light Higgs boson signal
• The Effective Standard Model after LHC Run I
• Potential precision of a direct measurement of the Higgs boson total width at a muon colliderr
• Potential Precision on Higgs Couplings and Total Width at the ILC
• Determining the Coupling of a Higgs Boson to $ZZ$ at Linear Colliders
• HZ Recoil Mass and Cross Section Analysis in ILD
• SGV 3.0 - a fast detector simulation
• Off-shell effects in Higgs processes at a linear collider and implications for the LHC
• Higgs Recoil Mass and Higgs-Strahlung Cross-Section Study for the ILD LOI

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• Contact Interactions in Higgs-Vector Boson Associated Production at the ILC
• Limits on the anomalous $Wtq$ couplings
• Comparing EFT and Exact One-Loop Analyses of Non-Degenerate Stops
• Measuring the ratio of $HWW$ and $HZZ$ couplings through $W^{+}{W}^{-}H$ production
• High energy lepton colliders as the ultimate Higgs microscopes
• Physics at a Higgs Factory
• Exploring anomalous $hb\bar{b}$ and $hb\bar{b}\gamma$ couplings in the context of the LHC and an $e^{+}{e}^{-}$ collider