Top-BESS model and its phenomenology

TL;DR

The paper introduces the top-BESS model, an effective theory describing a new vector resonance coupled to third-generation quarks, with implications for LHC and ILC phenomenology.

Contribution

It presents a modified BESS model focusing on the top quark sector, highlighting potential signals and hidden resonance effects in collider experiments.

Findings

Potential for sizable signals in LHC Drell-Yan processes

Resonance peaks can be hidden due to parameter interplay

Model parameters constrained by low-energy limits

Abstract

We introduce the top-BESS model which is the effective description of the strong electroweak symmetry breaking with a single new SU(2)_L+R triplet vector resonance. The model is a modification of the BESS model in the fermion sector. The triplet couples to the third generation of quarks only. This approach reflects a possible extraordinary role of the top quark in the mechanism of electroweak symmetry breaking. The low-energy limits on the model parameters found provide hope for finding sizable signals in the LHC Drell-Yan processes as well as in the s-channel production processes at the ILC. However, there are regions of the model parameter space where the interplay of the direct and indirect fermion couplings can hide the resonance peak in a scattering process even though the resonance exists and couples directly to top and bottom quarks.