Resonances and Unitarity in Weak Boson Scattering at the LHC

TL;DR

This paper introduces a comprehensive parameterization for simulating weak-boson scattering at the LHC, incorporating resonances, unitarization, and higher-order effects, implemented in the WHIZARD generator for improved analysis.

Contribution

It presents a new generic parameterization for weak-boson scattering that includes all possible resonances and unitarization, enhancing simulation accuracy at the LHC.

Findings

Implementation in WHIZARD enables detailed event simulation.

Comparison shows improved accuracy over effective W approximation.

Resonance modeling covers all spin and isospin states.

Abstract

A crucial test of the Standard Model is the measurement of electroweak gauge-boson scattering. In this paper, we describe a generic parameterization aimed at a realistic simulation of weak-boson scattering at the LHC. The parameterization implements resonances of all possible spin and isospin combinations, properly matched to the low-energy effective (chiral) Lagrangian, includes leading higher-order effects and contains a minimal unitarization scheme. We implement the parameterization in the Monte-Carlo event generator WHIZARD and present results for complete partonic cross-section integration and event generation. We provide a comparison with the effective W approximation that previously has been used for most WW scattering studies at hadron colliders.