Production of vector resonances at the LHC via WZ-scattering: a unitarized EChL analysis

Abstract

In the present work we study the production of vector resonances at the LHC by means of the vector boson scattering $WZ\to WZ$ and explore the sensitivities to these resonances for the expected future LHC luminosities. We are assuming that these vector resonances are generated dynamically from the self interactions of the longitudinal gauge bosons, $W_L$ and $Z_L$, and work under the framework of the electroweak chiral Lagrangian to describe in a model independent way the supposedly strong dynamics of these modes. The properties of the vector resonances, mass, width and couplings to the $W$ and $Z$ gauge bosons are derived from the inverse amplitude method approach. We implement all these features into a single model, the IAM-MC, adapted for MonteCarlo, built in a Lagrangian language in terms of the electroweak chiral Lagrangian and a chiral Lagrangian for the vector resonances, which mimics the resonant behavior of the IAM and provides unitary amplitudes. The model has been implemented in MadGraph, allowing us to perform a realistic study of the signal versus background events at the LHC. In particular, we have focused our study on the $pp\to WZjj$ type of events, discussing first on the potential of the hadronic and semileptonic channels of the final $WZ$, and next exploring in more detail the clearest signals. These are provided by the leptonic decays of the gauge bosons, leading to a final state with ${\ell }_1^{+}{\ell }_1^{-}{\ell }_2^{+}\nu jj$, $\ell =e,\mu$, having a very distinctive signature, and showing clearly the emergence of the resonances with masses in the range of 1.5-2.5 TeV, which we have explored.

arXiv commentRevised version accepted for publication in JHEP. Enlarged analysis. References added. 44 pages, 23 figures, 3 tables

References in corpus (35)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Automatized One-Loop Calculations in 4 and D dimensions
• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• The Minimal Composite Higgs Model
• Parton distributions with QED corrections
• Light scalar at LHC: the Higgs or the dilaton?
• From controversy to precision on the sigma meson: a review on the status of the non-ordinary $f_0(500)$ resonance
• Complete Electroweak Chiral Lagrangian with a Light Higgs at NLO
• The Effective Chiral Lagrangian for a Light Dynamical "Higgs Particle"
• A global fit of $\pi \pi$ and $\pi K$ elastic scattering in ChPT with dispersion relations
• Disentangling a dynamical Higgs
• Higgs At Last
• The Electroweak Chiral Lagrangian for the Standard Model with a Heavy Higgs
• Resonances and Unitarity in Weak Boson Scattering at the LHC
• One-loop $W_L{W}_L$ and $Z_L{Z}_L$ scattering from the Electroweak Chiral Lagrangian with a light Higgs-like scalar
• Proof of the Equivalence Theorem in the Chiral Lagrangian Formalism
• 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
• Fitting Higgs Data with Nonlinear Effective Theory
• Non-decoupling effects of the Standard Model Higgs boson to one loop
• Viability of strongly-coupled scenarios with a light Higgs-like boson
• LHC sensitivity to the resonance spectrum of a minimal strongly interacting electroweak symmetry breaking sector
• On the Equivalence Theorem in the $\chi PT$ Description of the Symmetry Breaking Sector of the Standard Model
• Light "Higgs", yet strong interactions
• The Equivalence Theorem for Chiral Lagrangians
• Oblique S and T Constraints on Electroweak Strongly-Coupled Models with a Light Higgs
• Unitarity, analyticity, dispersion relations and resonances in strongly interacting $W_L{W}_L$, $Z_L{Z}_L$ and $hh$ scattering
• Learning about the strongly interacting symmetry breaking sector at LHC
• Possible new resonance from $W_L{W}_L$-$hh$ interchannel coupling
• Fingerprints of heavy scales in electroweak effective Lagrangians
• One-Loop Calculation of the Oblique S Parameter in Higgsless Electroweak Models
• Inverse Amplitude Method for Perturbative Electroweak Symmetry Breaking Sector: The Singlet Higgs Portal as a Study Case
• Production cross section estimates for strongly-interacting Electroweak Symmetry Breaking Sector resonances at particle colliders
• Applicability constraints of the Equivalence Theorem
• Vector meson decays from the Extended Chiral Quark Model

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• Unitarization effects in EFT predictions of WZ scattering at the LHC
• Systematizing and addressing theory uncertainties of unitarization with the Inverse Amplitude Method
• Strongly coupled theories beyond the Standard Model
• Introducing tools to test Higgs interactions via $WW$ scattering I: one-loop calculations and renormalization in the HEFT
• Colorful Imprints of Heavy States in the Electroweak Effective Theory
• Same-sign WW Scattering in the HEFT: Discoverability vs. EFT Validity
• Dynamical vector resonances from the EChL in VBS at the LHC: the WW case
• A bottom-up approach within the electroweak effective theory: constraining heavy resonances
• Resonant production of Wh and Zh at the LHC
• Collider production of Electroweak resonances from photon-photon states
• Soft Wall holographic model for the minimal Composite Higgs
• A case study about the mass exclusion limits for the BSM vector resonances with the direct couplings to the third quark generation
• A search for new resonances in multiple final states with a high transverse momentum $Z$ boson in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
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