Exploring Drell-Yan signals from the 4D Composite Higgs Model at the LHC

TL;DR

This paper investigates Drell-Yan processes in a 4D Composite Higgs Model at the LHC, analyzing potential signals, resonance distinguishability, and the impact of heavy fermions on gauge boson line-shapes.

Contribution

It provides a detailed phenomenological analysis of neutral and charged current Drell-Yan signals in a 4D Composite Higgs Model, including resonance identification and correlations.

Findings

Multiple resonances can be distinguished in certain parameter regions.

Heavy fermionic states influence the gauge boson resonance line-shapes.

Resonance correlations can be exploited for better signal identification.

Abstract

We study the phenomenology of Drell-Yan processes at the Large Hadron Collider for the case of both the neutral and charged current channels within a recently proposed 4-Dimensional formulation of the Minimal Composite Higgs Model. We estimate the integrated and differential event rates at the CERN machine, assuming 14 TeV and data samples of ${\cal O}(100 {\rm{fb}}^{-1})$, as at lower energy and/or luminosity event rates are prohibitively small. We pay particular attention to the presence of multiple resonances in either channel, by showing that in certain region of parameter space some of these can be distinguishable and experimentally accessible in the invariant and/or transverse mass distribution, sampled in either the cross section, the forward-backward asymmetry or both. At the same time, we assess the indirect impact onto the line-shape of the emerging gauge boson resonances, both neutral and charged, of additional heavy fermionic states present in the spectrum of the model. Finally, we show how to exploit in the kinematic selection the fact that the extra neutral and charged gauge boson resonances in composite Higgs models are correlated in mass. Such results rely on a parton level study including a statystical error analysis.