Benchmarks for Double Higgs Production in the Singlet Extended Standard Model at the LHC

Understand

The simplest extension of the Standard Model is to add a gauge singlet scalar, $S$: the singlet extended Standard Model.

• In the absence of a $Z_2$ symmetry $S\rightarrow -S$ and if the new scalar is sufficiently heavy, this model can lead to resonant double Higgs production, significantly increasing the production rate over the Standard Model prediction.
• While searches for this signal are being performed, it is important to have benchmark points and models with which to compare the experimental results.
• In this paper we determine these benchmarks by maximizing the double Higgs production rate at the LHC in the singlet extended Standard Model.