LHC Benchmark Scenarios for the Real Higgs Singlet Extension of the Standard Model

TL;DR

This paper proposes specific benchmark scenarios for detecting an extra Higgs boson in the real Higgs singlet extension of the Standard Model at the LHC, considering current constraints and focusing on low and high mass regions.

Contribution

It provides updated benchmark scenarios for the real Higgs singlet extension, incorporating recent experimental constraints for LHC Run 2 searches.

Findings

Benchmark scenarios for low and high mass regions are defined.

Scenarios are consistent with current theoretical and experimental constraints.

Potential for discovery at the current LHC run is highlighted.

Abstract

We present benchmark scenarios for searches for an additional Higgs state in the real Higgs singlet extension of the Standard Model in Run 2 of the LHC. The scenarios are selected such that they fulfill all relevant current theoretical and experimental constraints, but can potentially be discovered at the current LHC run. We take into account the results presented in earlier work and update the experimental constraints from relevant LHC Higgs searches and signal rate measurements. The benchmark scenarios are given separately for the low mass and high mass region, i.e. the mass range where the additional Higgs state is lighter or heavier than the discovered Higgs state at around 125 GeV. They have also been presented in the framework of the LHC Higgs Cross Section Working Group.