Speaker
Description
The origin of mass in extended Higgs sectors may involve mechanisms beyond the conventional electroweak symmetry breaking paradigm. While the Standard Model (SM) attributes particle masses entirely to the electroweak vacuum expectation value (VEV), many well-motivated
extensions introduce additional sources of mass to nonstandard scalars through soft symmetry-breaking terms or contribute to the SM VEV through the vacuum expectation values of higher scalar multiplets. Such nonstandard contributions can significantly alter the masses and
interactions of the extended Higgs spectrum while leaving distinct experimental signatures. In this talk, I will discuss how collider observables, including Higgs signal strength measurements and
direct searches for additional scalar resonances, provide valuable insights into the origin of nonstandard scalar masses. Using the Two-Higgs-Doublet Model and the Georgi-Machacek model as representative examples, I will demonstrate how present LHC data constrain the relative role of electroweak symmetry breaking in generating nonstandard Higgs masses and reveal the structure of the extended scalar sector.
References:
1. arXiv: 2603.23280
2. Phys. Rev. D 109 (2024) 1, 015016