One-Loop Radiative Correction to the Triple Higgs Coupling in the Higgs Singlet Model

Understand

Though the 125 GeV Higgs boson is consistent with the standard model (SM) prediction until now, the triple Higgs coupling can deviate from the SM value in the physics beyond the SM (BSM).

• In this paper, the radiative correction to the triple Higgs coupling is investigated in the minimal extension of the SM by adding a real gauge singlet scalar.
• In this model there are two scalars $h$ and $H$, and both of them are mixing states of the doublet and singlet.
• Provided that the mixing angle is set to be zero, namely the SM limit, $h$ is the pure left-over of the doublet and its behaviour is the same as that of the SM at the tree level.