Distinguishing Higgs Potentials by Trilinear Higgs Boson Coupling Analysis

by Prof. Mitsuru Kakizaki (Toyama U.)

Friday 16 Aug 2024, 14:00 → 15:30 Asia/Seoul

Room 1423 (KIAS)

Title: Distinguishing Higgs Potentials by Trilinear Higgs Boson Coupling Analysis

Speaker: Prof. Mitsuru Kakizaki (Toyama U.)

Abstract: Although the Higgs boson has been discovered, its couplings still have room for deviation from the Standard Model prediction. Each extended Higgs model is characterized by its Higgs potential. Nearly aligned models, where the shape of the Higgs potential is described by one classical field, include the classical scale invariance model, the pseudo-Nambu-Goldstone model, the tadpole-induced model, and others. This classification enables us to scrutinize numerous models efficiently by measuring the trilinear Higgs coupling with high precision. In this study, we calculate the trilinear Higgs couplings in such models, including loop contributions from the top quark and new particles for various Higgs potentials, and investigate the feasibility of future collider experiments. For several benchmark parameters, we show to what extent future colliders, such as the High-Luminosity Large Hadron Collider and International Linear Collider, are capable of discriminating among several extended Higgs models.