Does the `Higgs' have Spin Zero?
arXiv:1202.6660 · doi:10.1007/JHEP09(2012)071
Abstract
The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin zero, and how this possibility could be confirmed in the near future. The excess observed in the gamma gamma final state could not have spin one, leaving zero and two as open possibilities. We calculate the angular distribution of gamma gamma pairs from the decays of a spin-two boson produced in gluon-gluon collisions, showing that is unique and distinct from the spin-zero case. We also calculate the distributions for lepton pairs that would be produced in the W W* decays of a spin-two boson, which are very different from those in Higgs decays, and note that the kinematics of the event selection used to produce the excess observed in the W W* final state have reduced efficiency for spin two.
22 pages, 22 figures, Version accepted for publication in JHEP, includes additional plots of dilepton mass distributions
References in corpus (12)
- Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV
- Search for the Standard Model Higgs boson in the diphoton decay channel with 4.9 fb-1 of pp collisions at sqrt(s) = 7 TeV with ATLAS
- Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
- Search for neutral Higgs bosons decaying to tau pairs in pp collisions at sqrt(s) = 7 TeV
- Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb-1 of pp collision data at sqrt(s) = 7 TeV with ATLAS
- Aspects of CP violation in the HZZ coupling at the LHC
- Search for the standard model Higgs boson decaying to a W pair in the fully leptonic final state in pp collisions at sqrt(s) = 7 TeV
- Search for the standard model Higgs boson in the decay channel H to ZZ to 4 leptons in pp collisions at sqrt(s) = 7 TeV
- Determining the CP properties of the Higgs boson
- Search for the standard model Higgs boson decaying to bottom quarks in pp collisions at sqrt(s) = 7 TeV
- Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV
- Search for the standard model Higgs boson in the H to ZZ to ll tau tau decay channel in pp collisions at sqrt(s)=7 TeV
Cited by in corpus (26)
- On the spin and parity of a single-produced resonance at the LHC
- Complete Higgs Sector Constraints on Dimension-6 Operators
- Precision Measurements of Higgs Couplings: Implications for New Physics Scales
- On the Interpretation of a Possible GeV Particle Decaying into
- Disentangling Higgs-Top Couplings in Associated Production
- Phenomenology of the Higgs Effective Lagrangian via FeynRules
- Limits on Anomalous Couplings of the Higgs to Electroweak Gauge Bosons from LEP and LHC
- Boosting the Direct CP Measurement of the Higgs-Top Coupling
- Higgs Quantum Numbers in Weak Boson Fusion
- A Fast Track towards the `Higgs' Spin and Parity
- Probing the Top-Higgs Yukawa CP Structure in dileptonic with -Assisted Reconstruction
- Higgs CP Properties From Early LHC Data
- Implications of LHC data on 125GeV Higgs-like boson for the Standard Model and its various extensions
- Precision studies of the Higgs boson decay channel H -> ZZ -> 4l with MEKD
- The Z+photon and diphoton decays of the Higgs boson as a joint probe of low energy SUSY models at LHC
- The Higgs: so simple yet so unnatural
- Is the New Resonance Spin 0 or 2? Taking a Step Forward in the Higgs Boson Discovery
- Inferring the nature of the boson at 125-126 GeV
- Jet substructure and probes of CP violation in Vh production
- Spin-2 Resonances in Vector-Boson-Fusion Processes at NLO QCD
- Note on 125 GeV Spin-2 particle
- The shape of spins
- Higgs Spin Determination in the WW channel and beyond
- Differentiating the production mechanisms of the Higgs-like resonance using inclusive observables at hadron colliders
- The weak bound state with the non-zero charge density as the LHC 126.5 GeV state
- Minimal physical constraints on the angular distributions of two-body boson decays