Higgs decay into photons through a spin-2 loop
arXiv:1208.5782 · doi:10.1103/PhysRevD.87.053003
Abstract
A new particle with proprieties similar to those of the Higgs boson in the Standard Model (SM) has been recently discovered. The biggest discrepancy is related to its diphoton decay, whose branching ratio seems to be around two times larger with respect to the correspondent SM value; this evidence, even if still affected by large uncertainties, suggests that clues of new physics related to the spontaneous breaking of the electroweak symmetry could be hidden under this loop-induced process. A new strongly-coupled sector responsible for this breaking, for instance, could produce in analogy with QCD a charged massive spin-2 state. In light of these arguments we calculate and discuss the role of such a resonance in the diphoton decay width of the Higgs.
12 pages + appendices, 5 figures. v2: minor changes, references added
References in corpus (15)
- 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
- Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV
- Light custodians in natural composite Higgs models
- Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC
- Beyond the Minimal Composite Higgs Model
- Techniques for the calculation of electroweak radiative corrections at the one-loop level and results for W-physics at LEP200
- Tasi 2009 lectures: The Higgs as a Composite Nambu-Goldstone Boson
- A Model Independent Ultraviolet Cutoff for Theories with Charged Massive Higher Spin Fields
- The apparent excess in the Higgs to di-photon rate at the LHC: New Physics or QCD uncertainties?
- Determination of New Electroweak Parameters at the ILC - Sensitivity to New Physics
- Intrinsic Cutoff and Acausality for Massive Spin 2 Fields Coupled to Electromagnetism
- Higgs Uncovering Light Scalar Remnants of High Scale Matter Unification
- Massive Spin-2 States as the Origin of the Top Quark Forward-Backward Asymmetry
- Electromagnetically Interacting Massive Spin-2 Field: Intrinsic Cutoff and Pathologies in External Fields