Flavoring the production of Higgs pairs

TL;DR

This paper explores the potential to detect a hypothetical Flavon particle in extended Standard Model scenarios at the High Luminosity LHC, focusing on specific decay channels and parameter space conditions.

Contribution

It proposes a novel search strategy for the Flavon particle via its decay into Higgs and bottom quark pairs, with detailed predictions for detection significance at future collider runs.

Findings

Potential 5σ evidence for Flavon at 800 GeV in bar{b}h channel.

Possible 2σ evidence for Flavon at 900 GeV in γγh channel.

Predicted detection with high luminosity at HL-LHC.

Abstract

We present a study on the possibility of observing a hypothetical particle known as the Flavon $H_F$, which is predicted in an extension of the standard model that includes the so-called Froggatt-Nielsen mechanism. The proposed decay channel is through a $b\bar{b}h$ final state, where the Higgs boson $(h)$ decays to a pair of photons or a pair of $b$ quarks $(h\to \gamma\gamma,\,b\bar{b})$. We found that, under special scenarios of the model parameter space, the processes analyzed could provide evidence for the existence of the Flavon in the next stage of the LHC: the High Luminosity LHC. Specifically, we predict a \textit{signal significance} of $5\sigma$ ($2\sigma$) in the $h\to b\bar{b}$ ($h\to\gamma\gamma$) channel for a Flavon mass of $800$ ($900$) GeV and an integrated luminosity of $2500$ ($3000$) fb$^{-1}$.