74 citations · 759 across the 44 of their papers we have counts for
44 papers
Revisiting Vector-like Quark Model with Enhanced Top Yukawa Coupling
Michio Hashimoto
We revisit a scenario with an enhanced top yukawa coupling in vector-like quark (VLQ) models, where the top yukawa coupling is larger than the standard model value and the lightest…
A scalar hint from the diboson excess?
Giacomo Cacciapaglia, Aldo Deandrea, Michio Hashimoto
In view of the recent diboson resonant excesses reported by both ATLAS and CMS Collaborations, we suggest that a new weak singlet pseudo-scalar particle, , may decay into two…
Stueckelberg model and Composite Z'
Michio Hashimoto
Based on Ref.[1], we study a composite Z' model which effectively induces the Stueckelberg model in low energy. It turns out that the mass of the composite Z' boson contains the St…
Composite Z'
Michio Hashimoto
We investigate a possibility of a composite Z' vector boson. For the compositeness, the required gauge coupling g in low energy is not so big, g^2/(4π) > 0.015 in the case of the U…
Radiative Symmetry Breaking from Flat Potential in various U(1)' models
Michio Hashimoto, Satoshi Iso, Yuta Orikasa
We investigate a radiative electroweak gauge symmetry breaking scenario via the Coleman-Weinberg mechanism starting from a completely flat Higgs potential at the Planck scale ("fla…
Radiative symmetry breaking at the Fermi scale and flat potential at the Planck scale
Michio Hashimoto, Satoshi Iso, Yuta Orikasa
We investigate a possibility of the "flatland scenario", in which the electroweak gauge symmetry is radiatively broken via the Coleman-Weinberg mechanism starting from a completely…