Triple Higgs Boson Production at the Large Hadron Collider with Two Real Singlet Scalars

TL;DR

This paper explores the production of three Higgs bosons in an extended Standard Model with two additional singlet scalars, focusing on resonant production and decay chains leading to six bottom quarks at the LHC.

Contribution

It introduces a novel analysis of triple Higgs production via a two singlet scalar extension, highlighting potential discovery channels at the LHC.

Findings

Resonant production of three Higgs bosons identified as promising signals.

The dominant decay channel results in six bottom quarks, providing a clear experimental signature.

Discovery prospects are evaluated for current and future LHC runs.

Abstract

We investigate the production of three Higgs bosons in the Two Real Singlet extension of the Standard Model, where the scalar sector is augmented by two additional real scalar fields which are singlets under the Standard Model gauge group. The model contains three neutral CP-even scalars, allowing for resonant production and asymmetric decay chains. We focus on the signature $p p\,\rightarrow\,h_3\,\rightarrow\,h_1\,h_2\,\rightarrow\,h_1\,h_1\,h_1$, where we identify $h_3$ as the heaviest scalar state, $h_2$ as the second heaviest and the lightest, $h_1$, as the Standard Model-like Higgs boson discovered by the Large Hadron Collider experiments. The dominant final state occurs when all three Higgs bosons decay to bottom-anti-bottom quark pairs, $h_1\,\rightarrow\,b\,\bar{b}$, leading to 6 $b$-jets. Taking into account all current theoretical and experimental constraints, we determine the discovery prospects for this channel in future runs of the Large Hadron Collider, as well as in the high-luminosity phase.