• DOI:10.1140/epjc/s10052-017-4768-y
• Corpus ID: 119277349

Coupling WW, ZZ unitarized amplitudes to $$\gamma \gamma $$γγ in the TeV region

@article{Delgado2016CouplingWZ,
  title={Coupling WW, ZZ unitarized amplitudes to \$\$\gamma \gamma \$\$$\gamma$$\gamma$ in the TeV region},
  author={Rafael L. Delgado and Antonio Dobado and Felipe J. Llanes-Estrada},
  journal={The European Physical Journal C},
  year={2016},
  volume={77},
  pages={1-13}
}

• R. Delgado, A. Dobado, F. Llanes-Estrada
• Published 20 September 2016
• Physics
• The European Physical Journal C

We define and calculate helicity partial-wave amplitudes for processes linking the Electroweak Symmetry Breaking Sector (EWSBS) to $$\gamma \gamma $$γγ, employing (to NLO) the Higgs-EFT (HEFT) extension of the Standard Model and the Equivalence Theorem, while neglecting all particle masses. The resulting amplitudes can be useful in the energy regime ($$500~\mathrm{{GeV}}{-}3~\mathrm{{TeV}}$$500GeV-3TeV). We also deal with their unitarization so that resonances of the EWSBS can simultaneously be described in the $$\gamma \gamma $$γγ initial or final states. Our resulting amplitudes satisfy unitarity, perturbatively in $$\alpha $$α, but for all s values. In this way we improve on the HEFT that fails as interactions become stronger with growing s and we provide a natural framework for the decay of dynamically generated resonances into WW, ZZ and $$\gamma \gamma $$γγ pairs.