Speaker
Description
Higgs precision measurements provide an opportunity to test various extended Higgs models. To exploit the high precision of future experimental measurements, theoretical predictions must be calculated with comparable precision by including higher-order corrections. To probe the structure of the Higgs sector through future precision measurements, we have developed a program, H-COUP, which performs precise calculations of Higgs boson decays in various extended Higgs models. In this talk, we discuss physics that can be explored with H-COUP. As a recent application, we discuss the predictions for Higgs boson decays in the real Higgs triplet model. We show that characteristic predictions of the model are obtained after including one-loop corrections, allowing the real Higgs triplet model to be distinguished from other simple extended Higgs models. This distinction can be achieved through high-precision measurements of the discovered Higgs boson at future lepton colliders.
