The Effect of Composite Resonances on Higgs decay into two photons

Abstract

In scenarios of strongly coupled electroweak symmetry breaking, heavy composite particles of different spin and parity may arise and cause observable effects on signals that appear at loop levels. The recently observed process of Higgs to $\gamma \gamma$ at the LHC is one of such signals. We study the new constraints that are imposed on composite models from $H\to \gamma \gamma$, together with the existing constraints from the high precision electroweak tests. We use an effective chiral Lagrangian to describe the effective theory that contains the Standard Model spectrum and the extra composites below the electroweak scale. Considering the effective theory cutoff at $\Lambda =4\pi v\sim 3$ TeV, consistency with the $T$ and $S$ parameters and the newly observed $H\to \gamma \gamma$ can be found for a rather restricted range of masses of vector and axial-vector composites from $1.5$ TeV to $1.7$ TeV and $1.8$ TeV to $1.9$ TeV, respectively, and only provided a non-standard kinetic mixing between the $W^3$ and $B^0$ fields is included.

30 pages, 10 figures. Version for publication in European Physical Journal C

References in corpus (26)

• 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
• Effective Lagrangian for a light Higgs-like scalar
• The Effective Chiral Lagrangian for a Light Dynamical "Higgs Particle"
• Minimal Walking Technicolor: Set Up for Collider Physics
• The Higgs boson from an extended symmetry
• Tasi 2009 lectures: The Higgs as a Composite Nambu-Goldstone Boson
• Implications of a Light Higgs in Composite Models
• Technicolor Walks at the LHC
• A 125 GeV composite Higgs boson versus flavour and electroweak precision tests
• Modified Higgs Physics from Composite Light Flavors
• Vector-like quarks in a composite Higgs model
• Electroweak Symmetry Breaking from a Holographic Fourth Generation
• Flavour with a Light Dynamical "Higgs Particle"
• Heavy Vectors in Higgs-less models
• Describing viable technicolor scenarios
• Constraining Walking and Custodial Technicolor
• Simple and Realistic Composite Higgs Models in Flat Extra Dimensions
• Benchmarks for new strong interactions at the LHC
• General Sum Rules for WW Scattering in Higgsless Models: Equivalence Theorem and Deconstruction Identities
• Drell-Yan production of Heavy Vectors in Higgsless models
• A minimally tuned composite Higgs model from an extra dimension
• The 125 GeV boson: A composite scalar?
• Higgs decay into diphoton in the Composite Higgs Model
• Composite Vectors and Scalars in Theories of Electroweak Symmetry Breaking
• Associated scalar-vector production at the LHC within an effective Lagrangian approach

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• The Technicolor Higgs in the Light of LHC Data
• A 3-3-1 model with low scale seesaw mechanisms
• Fermion masses and mixings and some phenomenological aspects of a 3-3-1 model with linear seesaw mechanism
• Future tests of Higgs compositeness: direct vs indirect
• Higgs Boson Phenomenology in a Simple Model with Vector Resonances
• Hadron Collider Searches for Diboson Resonances
• String breaking and running coupling of $\mathrm{Q}\bar{\mathrm{Q}}$ in a rotating media from holography
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