Parton-shower effects in Higgs production via Vector-Boson Fusion

Abstract

We present a systematic investigation of parton-shower and matching perturbative uncertainties for Higgs-boson production via vector-boson fusion. To this end we employ different generators at next-to-leading order QCD accuracy matched with shower Monte Carlo programs, PYTHIA8, and HERWIG7, and a next-to-next-to-leading order QCD calculation. We thoroughly analyse the intrinsic sources of uncertainty within each generator, and then compare predictions among the different tools using the respective recommended setups. Within typical vector-boson fusion cuts, the resulting uncertainties on observables that are accurate to next-to-leading order are at the 10% level for rates and even smaller for shapes. For observables sensitive to extra radiation effects uncertainties of about 20% are found. We furthermore show how a specific recoil scheme is needed when PYTHIA8 is employed, in order not to encounter unphysical enhancements for these observables. We conclude that for vector-boson fusion processes an assessment of the uncertainties associated with simulation at next-to-leading order matched to parton showers based only on the variation of renormalisation, factorisation and shower scales systematically underestimates their true size.

arXiv commentv2 matches the version published on EPJC

References in corpus (60)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Herwig++ Physics and Manual
• Matching NLO QCD computations and parton shower simulations
• LHAPDF6: parton density access in the LHC precision era
• PDF4LHC recommendations for LHC Run II
• Scattering Amplitudes with Open Loops
• Herwig 7.0 / Herwig++ 3.0 Release Note
• Three-jet cross sections to next-to-leading order
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• Reduction schemes for one-loop tensor integrals
• CutTools: a program implementing the OPP reduction method to compute one-loop amplitudes
• Combined measurements of Higgs boson production and decay using up to $80$ fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment
• Automation of one-loop QCD corrections
• VBFNLO: A parton level Monte Carlo for processes with electroweak bosons
• Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
• NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG
• Automation of next-to-leading order computations in QCD: the FKS subtraction
• A general approach to jet cross sections in QCD
• Higgs production via vector-boson fusion at NNLO in QCD
• Robust Independent Validation of Experiment and Theory: Rivet version 3
• The automation of next-to-leading order electroweak calculations
• Structure Function Approach to Vector-Boson Scattering in pp Collisions
• Next-to-leading order jet distributions for Higgs boson production via weak-boson fusion
• New formalism for QCD parton showers
• Vector-boson fusion Higgs production at N${}^3$LO in QCD
• Ninja: Automated Integrand Reduction via Laurent Expansion for One-Loop Amplitudes
• Coherent Parton Showers with Local Recoils
• Dipole Showers and Automated NLO Matching in Herwig++
• Four-lepton production at hadron colliders: aMC@NLO predictions with theoretical uncertainties
• Higgs Boson Production in Weak Boson Fusion at Next-to-Leading Order
• VBFNLO: A parton level Monte Carlo for processes with electroweak bosons -- Manual for Version 3.0
• Vector boson fusion at NNLO in QCD: SM Higgs and beyond
• Integrand reduction of one-loop scattering amplitudes through Laurent series expansion
• Second-order QCD effects in Higgs boson production through vector boson fusion
• Dominant next-to-leading order QCD corrections to Higgs plus three jet production in vector-boson fusion
• Some Dipole Shower Studies
• Precise predictions for same-sign W-boson scattering at the LHC
• Electroweak Higgs plus Three Jet Production at NLO QCD
• Off-shell single-top production at NLO matched to parton showers
• Parton Shower Uncertainties with Herwig 7: Benchmarks at Leading Order
• Gluon-Induced Weak Boson Fusion
• Tensor integrand reduction via Laurent expansion
• Jet cross sections at the LHC and the quest for higher precision
• Electroweak production of two jets in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Parton Shower and Matching Uncertainties in Top Quark Pair Production with Herwig 7
• Lepton-pair production in association with a $b\bar{b}$ pair and the determination of the $W$ boson mass
• Stress-testing the VBF approximation in multijet final states
• Parton Shower Matching Systematics in Vector-Boson-Fusion WW Production
• Higgs production through vector-boson fusion at the NLO matched with parton showers
• Parton-shower effects on Higgs boson production via vector-boson fusion in association with three jets
• Jet clustering dependence of VBF Higgs production

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• Evidence for Higgs boson decay to a pair of muons
• Collider Physics at the Precision Frontier
• Search for nonresonant Higgs boson pair production in final states with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• PanScales parton showers for hadron collisions: formulation and fixed-order studies
• Les Houches 2021: Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• Vector-Boson Scattering at the LHC: unravelling the Electroweak sector
• Majorana Neutrinos in Same-Sign $W^{\pm }{W}^{\pm }$ Scattering at the LHC: Breaking the TeV Barrier
• Next-to-leading-logarithmic PanScales showers for Deep Inelastic Scattering and Vector Boson Fusion
• Search for the lepton-flavor violating decay of the Higgs boson and additional Higgs bosons in the e$\mu$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• NLO Multijet Merging for Higgs Production Beyond the VBF Approximation
• Soft QCD Effects in VBS/VBF Topologies
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• Observation of electroweak W${}^{+}$W${}^{-}$ pair production in association with two jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• A comparative study of Higgs boson production from vector-boson fusion
• KrkNLO matching for colour-singlet processes
• Precision tools for the simulation of double-Higgs production via vector-boson fusion
• Influence of QCD parton shower in deep learning invisible Higgs through vector boson fusion
• Electroweak corrections and shower effects to Higgs production in association with two jets at the LHC
• Higgs production via vector-boson fusion at the LHC
• Multi-Jet Production in Deep Inelastic Scattering with Pythia
• Vector boson scattering and anomalous quartic couplings in final states with $\ell \nu$qq or $\ell \ell$qq plus jets using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Model-independent measurement of the Higgs boson associated production with two jets and decaying to a pair of W bosons in proton-proton collisions at $\sqrt{s}$ = 13 TeV