Describing 2-TeV scale W_L W_L resonances with Unitarized Effective Theory

TL;DR

This paper explores the potential for 2-TeV resonances in the electroweak sector at the LHC using Unitarized Effective Theory, providing a framework to identify resonance properties and inform higher-energy theories.

Contribution

It introduces a method to describe and locate 2-TeV resonances in the electroweak sector using Unitarized Effective Theory, linking resonance data to underlying effective Lagrangian parameters.

Findings

Resonance positions can be identified in the complex s-plane.

The approach constrains resonance parameters consistent with unitarity and causality.

Commentary on potential excess in ATLAS dijet data at 2 TeV.

Abstract

The LHC is now exploring the 1-3 TeV scale where resonances of the Electroweak Symmetry Breaking Sector might exist. If so, Unitarized Effective Theory can be used to describe the data with all the constraints of unitarity, causality and global-symmetry breaking, and to find the resonance positions in the complex s-plane. From any resonances found, one can infer the parameters of the universal Effective Lagrangian, and those may be used to inform higher-energy theories (UV completions) that can be matched to it. We exemplify with two-body resonances in the coupled channels hh and W_L W_L- Z_L Z_L employing the Equivalence Theorem and comment on the apparent excess in the ATLAS dijet data at 2 TeV.