149 citations · 671 across the 50 of their papers we have counts for
7 papers · 1 filter
Reheating-era leptogenesis
Yuta Hamada, Kiyoharu Kawana
We propose a novel leptogenesis scenario at the reheating era. Our setup is minimal in the sense that, in addition to the standard model Lagrangian, we only consider an inflaton an…
Natural solution to the naturalness problem -- Universe does fine-tuning
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana
We propose a new mechanism to solve the fine-tuning problem. We start from a multi-local action $ S=\sum_{i}c_{i}S_{i}+\sum_{i,j}c_{i,j}S_{i}S_{j}+\sum_{i,j,k}c_{i,j,k}S_{i}S_{j}S_…
Saddle point inflation in string-inspired theory
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana
The observed value of the Higgs mass indicates the possibility that there is no supersymmetry below the Planck scale and that the Higgs can play the role of the inflaton. We examin…
Landau pole in the Standard Model with weakly interacting scalar fields
Yuta Hamada, Kiyoharu Kawana, Koji Tsumura
We consider the Standard Model with a new scalar field which is a representation of the with a hypercharge . The renormalization group running effects o…
Vanishing Higgs Potential in Minimal Dark Matter Models
Yuta Hamada, Kiyoharu Kawana
We consider the Standard Model with a new particle which is charged under with the hypercharge being zero. Such a particle is known as one of the dark matter (DM) candi…
Multiple Point Principle of the Gauged B-L Model
Kiyoharu Kawana
We consider the multiple point principe (MPP), its breaking and the inflation of the gauged B-L model. Our results are based on the two-loop renormalization group equations (RGEs).…
Criticality and Inflation of the Gauged B-L Model
Kiyoharu Kawana
We consider the multiple point principle (MPP) and the inflation of the gauged B-L extension of the Standard Model (SM) with a classical conformality. We examine whether the scalar…