Uncovering the high-scale Higgs singlet model

The scalar singlet model extends the Standard Model with addition of a new gauge scalar. We re-examine limits on from oblique parameter fits and global fit to precision electroweak observables present analytic expressions for our results. For case when is much heavier than weak scale, we map onto dimension-six effective field theory (SMEFT) review allowed space unitarity considerations requirement that minimum be stable. A data, along LHC observables, used constrain parameters high scale determine numerical effects performing matching at both tree level 1-loop.