Enhanced di-Higgs boson production in the complex Higgs singlet model

S. Dawson,M. Sullivan

doi:10.1103/physrevd.97.015022

Abstract

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. Results are presented for $\sqrt{S}=13$, $27$ and $100~TeV$.

Highlights

The exploration of the Higgs sector is a primary focus of the LHC physics program, with measurements of the Higgs couplings to fermions and gauge bosons, the Higgs mass, and Higgs CP properties becoming ever more precise
The complex singlet model is an example of new physics that will first be seen in the study of di-Higgs resonances [22,33]
We perform a scan over the parameters of Eq (7), subject to the restrictions discussed in the previous section

Summary

INTRODUCTION

The exploration of the Higgs sector is a primary focus of the LHC physics program, with measurements of the Higgs couplings to fermions and gauge bosons, the Higgs mass, and Higgs CP properties becoming ever more precise. In the presence of a scalar resonance coupling to the SM-like Higgs boson, the double Higgs rate can be significantly enhanced. This can occur in the minimal supersymmetric standard model (MSSM) and the next-tominimal supersymmetric standard model (NMSSM), for example. Our most interesting results are the implications for double Higgs studies and the description of scenarios where one of the new Higgs bosons is predominantly produced in association with the 125 GeV boson.

Published by the American Physical Society

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RESULTS

CONCLUSIONS