Confront a dilaton model with the LHC measurements

Abstract

The origin of the Higgs boson ($H_{125}$), discovered in 2012, remains a mystery. In the metric affine theory (MAT) framework, we study the scalar potential and investigate a couple of scenarios for the symmetry breaking mechanisms with a dilaton model which is derived from the geometry. The LHC constraints for the couplings of Yukawa couplings, Higgs-weak vector bosons and Higgs self-couplings, in this model are examined, which identify the parameter space where the discovered Higgs boson $m_h=125$ GeV can be dilaton-dominant and the features of Higgs self-couplings are explored. It is found that via the measurements of Higgs pair production, the High Luminosity LHC (HL-LHC) running can either confirm or rule out the dilaton dominance.

Figures (6)

• Figure 1: Allowed parameter space by experiments for TSS in $\chi$ and $s$ plane is shown.
• Figure 2: Allowed parameter space in the HSS is shown.
• Figure 3: The constraints on $\kappa_{f}$ in the TSS(upper)/HSS(lower) scenarios are shown.
• Figure 4: The varying of $\kappa_{3h/4h}$ with parameter $s$ in the TSS are shown($\chi =0$).
• Figure 5: The constraints to $\kappa_{2V/3h/4h}$ in the HSS are shown.