Novel signatures of additional Higgs bosons at the LHC

TL;DR

This paper explores new, unexplored signatures of extended Higgs sectors at the LHC, focusing on Higgs-to-Higgs decays and charged Higgs decays, providing benchmarks for future experiments.

Contribution

It introduces novel LHC signatures involving multiple BSM Higgs bosons and charged Higgs decays, with benchmark scenarios for experimental searches.

Findings

Identification of Higgs-to-Higgs decay signatures in the TRSM model.

Charged Higgs decay to W boson and BSM Higgs as a dominant channel.

Provision of benchmark scenarios for experimental testing.

Abstract

We identify two types of well-motivated, so-far experimentally unexplored LHC signatures of extended Higgs sectors: First, Higgs-to-Higgs decay signatures that involve (at least) two Beyond-the-Standard Model (BSM) neutral scalar bosons, $\phi_i \to \phi_j \phi_k$. These signatures are discussed in the framework of the Two-Real-Singlet-Model (TRSM), which can furthermore exhibit cascades of Higgs-to-Higgs decays leading to multi-Higgs final states. Second, the charged Higgs boson decay to a W boson and a neutral BSM Higgs boson, which can easily become the dominant decay within the Two-Higgs-Doublet-Model (2HDM) parameter space. We provide benchmark scenarios for future experimental studies of these signatures.