Kei Yagyu

TL;DR: In this article, the decay properties of Higgs bosons in each type model were examined, and the differences between these models in collider phenomenology were shed light on the differences among these models.

TL;DR: The work of the Energy Frontier Higgs Boson working group of the 2013 Community Summer Study (Snowmass) as discussed by the authors summarizes the key elements of a precision Higgs physics program and document the physics potential of future experimental facilities as elucidated during the Snowmass study.

TL;DR: In this paper, the authors evaluate expected excluded regions for the mass of additional neutral Higgs bosons from direct searches at the LHC with the 14 TeV collision energy in the two Higgs doublet models with a softly broken discrete symmetry, and demonstrate how the pattern of deviations can be different among various Higgs sectors that predict the electroweak rho parameter to be unity.

TL;DR: In this article, the authors study radiative corrections to the electroweak parameters in the Higgs model with the triplet field, which is introduced in the scenario of generating neutrino masses based on the so-called type II seesaw mechanism.

TL;DR: In this article, the mass differences among scalar bosons of the Higgs triplet field with the hypercharge of $Y = 1 were investigated and compared with the case with doubly-charged scalars.