Note on 125 GeV Spin-2 particle

Abstract

A new boson around 125 GeV without specific spin has been observed by both ATLAS and CMS at the LHC. Since its decay into a diphoton excludes the spin-1 case by the Landau-Yang theorem,it leaves 0 or 2 as the possible lowest spin for the new boson. Instead of the well-established spin-0 Higgs-like boson, we take this new boson to be a spin-2 massive Graviton-like particle denoted as $G$, which exists copiously in extra-dimension theories, and concentrate on its phenomenology. In particular, we calculate the three-body decays of $G\to Vf{\bar{f}}^{\prime }$ with $V$ and $f^{(\prime )}$ the gauge boson and fermions in the standard model (SM) and compare our results with those of the SM Higgs boson. The couplings between $G$ and $V$s are also estimated by fitting the data. A new observable that can distinguish $G$ from the Higgs is proposed.

13 pages, 6 figures, some detail derivations and references added, new version accepted by PLB

References in corpus (7)

• 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
• Light scalar at LHC: the Higgs or the dilaton?
• Global Analysis of the Higgs Candidate with Mass ~ 125 GeV
• Standard Model couplings and collider signatures of a light scalar
• HELAS and MadGraph/MadEvent with spin-2 particles
• Implications of LHC Searches for Massive Graviton

Cited by in corpus (22)

• Complete Higgs Sector Constraints on Dimension-6 Operators
• Precision Measurements of Higgs Couplings: Implications for New Physics Scales
• Spin-2 Portal Dark Matter
• Phenomenology of the Higgs Effective Lagrangian via FeynRules
• Beyond Geolocating: Constraining Higher Dimensional Operators in $H\to 4\ell$ with Off-Shell Production and More
• Implications of LHC data on 125GeV Higgs-like boson for the Standard Model and its various extensions
• An effective gauge-Higgs operators analysis of new physics associated with the Higgs
• Associated Production Evidence against Higgs Impostors and Anomalous Couplings
• The role of interference in unraveling the ZZ-couplings of the newly discovered boson at the LHC
• Exploring Theory Space with Monte Carlo Reweighting
• Inferring the nature of the boson at 125-126 GeV
• Spin-2 Resonances in Vector-Boson-Fusion Processes at NLO QCD
• Prima Facie Evidence against Spin-Two Higgs Impostors
• The shape of spins
• Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess
• Higgs Spin Determination in the WW channel and beyond
• Excluding a Generic Spin-2 Higgs Impostor
• Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
• Differentiating the production mechanisms of the Higgs-like resonance using inclusive observables at hadron colliders
• Further Studies of Higgs Properties at An ILC $\gamma \gamma$ Collider
• On infrared problems of effective Lagrangians of massive spin 2 fields coupled to gauge fields
• The Higgs-like boson spin from the center-edge asymmetry in the diphoton channel