Scalar resonance in a top partner model

TL;DR

This paper analyzes the phenomenology of a scalar resonance within a top partner model based on an $SO(5)$ Composite Higgs framework, exploring production, decay modes, and parameter space constraints from LHC data.

Contribution

It provides a detailed analysis of scalar resonance production and decay in a top partner model, including the effects of extra fermion-resonance interactions and LHC constraints.

Findings

Scalar resonances can be produced via QCD and SM interactions.

Parameter space is significantly constrained by LHC searches for vector-like quarks.

Extra fermion-resonance effects impact the allowed regions of the model.

Abstract

The phenomenology entailed by a scalar resonance in a top partner model is analysed here in a $SO(5)$ Composite Higgs formalism. Heavy scalar resonances production and their decays modes are explored along a benchmark resonance mass range. The production of single-double partner final states has been scanned along the partner mass scale. QCD drives such production, as well as the SM gauge, Higgs, plus the intermediation of the scalar resonance. Non-zero contributions are induced as long as extra fermion-resonance effects are included. Finally, we have excluded regions of the parameter spaces underlying our framework by imposing the recent LHC searches for vector-like quarks production in $pp$-collisions at 13 TeV. Substantial reduction of the allowed regions occurs if extra fermion-resonance effects are accounted for, leading us to test the involved parametric dependence in the shed light of new matter interactions.