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

Abstract

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

23 pages, 9 figures

References in corpus (14)

• 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
• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• Light custodians in natural composite Higgs models
• Light scalar at LHC: the Higgs or the dilaton?
• How bright is the proton? A precise determination of the photon parton distribution function
• The complete HEFT Lagrangian after the LHC Run I
• Evidence for exclusive gamma gamma to W+W- production and constraints on anomalous quartic gauge couplings in pp collisions at sqrt(s) = 7 and 8 TeV
• Longitudinal WW scattering in light of the "Higgs" discovery
• One-loop $\gamma \gamma \to W_L^{+}{W}_L^{-}$ and $\gamma \gamma \to Z_L{Z}_L$ from the Electroweak Chiral Lagrangian with a light Higgs-like scalar
• CP violation with a dynamical Higgs
• On the renormalization of the electroweak chiral Lagrangian with a Higgs
• Unitarity, analyticity, dispersion relations and resonances in strongly interacting $W_L{W}_L$, $Z_L{Z}_L$ and $hh$ scattering
• Possible new resonance from $W_L{W}_L$-$hh$ interchannel coupling

Cited by in corpus (9)

• Constraints on anomalous quartic gauge couplings via $W\gamma jj$ production at the LHC
• Constraints on anomalous quartic gauge couplings via $Z\gamma jj$ production at the LHC
• Constraints on anomalous quartic gauge couplings by $\gamma \gamma \to W^{+}{W}^{-}$ scattering
• Strongly coupled theories beyond the Standard Model
• Extract the energy scale of anomalous $\gamma \gamma \to W^{+}{W}^{-}$ scattering in the vector boson scattering process using artificial neural networks
• Search for high-mass exclusive $\gamma \gamma$ $\to$ WW and $\gamma \gamma$ $\to$ ZZ production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Production of $W^{+}{W}^{-}$ pairs via ${\gamma }^{\ast }{\gamma }^{\ast }\to W^{+}{W}^{-}$ subprocess with photon transverse momenta
• Collider production of Electroweak resonances from photon-photon states
• Unitarity and Unitarization