One-loop corrections to the Higgs self-couplings in the singlet extension

• DOI: 10.1016/j.nuclphysb.2017.02.004
• Publication Date: 2017-02-16T07:30:49Z
• Authors: Shinya Kanemura; Mariko Kikuchi; Kei Yagyu
• Keywords: Scalar boson

We investigate predictions on the triple Higgs boson couplings with radiative corrections in model an additional real singlet scalar field. In this model, second physical state ($H$) appears addition to ($h$) mass 125 GeV. The $hhh$ vertex is calculated at one-loop level, and its possible deviation from standard evaluated under various theoretical constraints. decay rate of $H \to hh$ also computed level. take into account bound precise measurement $W$ mass, which gives upper limit mixing angle $\alpha$ between two bosons for a given value $H$ ($m_H^{}$). find that coupling prediction can maximally be about 250\%, 150\% 75\% $m_H^{}=300$, 500 1000 GeV, respectively, requirement cutoff scale higher than 3 TeV. discuss deviations double production gluon fusion LHC using corrected vertices.