Enhanced di-Higgs Production in the Complex Higgs Singlet Model

Understand

We consider the Standard Model extended by the addition of a complex scalar singlet, with no assumptions about additional symmetries of the potential.

• This model provides for resonant di-Higgs production of Higgs particles with different masses.
• We demonstrate that regions of parameter space allowed by precision electroweak measurements, experimental limits on single Higgs production, and perturbative unitarity allow for large di-Higgs production rates relative to the SM rates.
• In this scenario, the dominant production mechanism of the new scalar states is di-Higgs production.