Higgs Spin Determination in the WW channel and beyond

Abstract

After the discovery of the 126 GeV resonance at the LHC, the determination of its features, including its spin, is a very important ongoing task. In order to distinguish the two most likely spin hypotheses, spin-0 or spin-2, we study the phenomenology of a light Higgs-like spin-2 resonance produced in different gluon-fusion and vector-boson-fusion processes at the LHC. Starting from an effective model for the interaction of a spin-2 particle with the SM gauge bosons, we calculate cross sections and differential distributions within the Monte Carlo program Vbfnlo. We find that with specific model parameters such a spin-2 resonance can mimic SM Higgs rates and transverse-momentum distributions in $\gamma \gamma$, $WW$ and $ZZ$ decays, whereas several distributions allow to separate spin-2 from spin-0, independently of the spin-2 model parameters.

14 pages, 7 figures

References in corpus (14)

• 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
• New parton distributions for collider physics
• Evidence for the spin-0 nature of the Higgs boson using ATLAS data
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• VBFNLO: A parton level Monte Carlo for processes with electroweak bosons
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• A framework for Higgs characterisation
• Measuring spin and CP from semi-hadronic ZZ decays using jet substructure
• Search for the Standard Model Higgs boson in the H -> WW(*) -> l nu l nu decay mode with 4.7 /fb of ATLAS data at sqrt(s) = 7 TeV
• Single-variable asymmetries for measuring the `Higgs' boson spin and CP properties
• Spin-2 Resonances in Vector-Boson-Fusion Processes at NLO QCD
• Distinguishing `Higgs' Spin Hypotheses using gamma gamma and WW* Decays
• Release Note -- Vbfnlo-2.6.0

Cited by in corpus (7)

• Precision Measurements of Higgs Couplings: Implications for New Physics Scales
• Beyond Geolocating: Constraining Higher Dimensional Operators in $H\to 4\ell$ with Off-Shell Production and More
• Exploring Theory Space with Monte Carlo Reweighting
• Excluding a Generic Spin-2 Higgs Impostor
• Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
• Higher Order Corrections to the Trilinear Higgs Self-Couplings in the Real NMSSM
• The Higgs-like boson spin from the center-edge asymmetry in the diphoton channel