50 citations · 432 across the 53 of their papers we have counts for
53 papers
Optimizing Yukawa couplings to suppress Dimension-five Proton Decay in GUT
Naoyuki Haba, Junpei Ikemoto, Yasuhiro Shimizu +1
The minimal supersymmetric grand unified theory (GUT) provides a highly compelling framework for physics beyond the Standard Model (SM). However, it suffers from a severe p…
Correlation Between Proton Decay Channels and the Axion Mass in an Extended SU(5) GUT
Naoyuki Haba, Keisuke Nagano, Yasuhiro Shimizu +1
We study a renormalizable SU(5) grand unified theory (GUT) supplemented by a 45-dimensional Higgs field and a DFSZ axion sector, imposing a Georgi--Jarlskog flavor structure at the…
Gravitational Waves from Phase Transition in a Supersymmetric Left-Right Model
Naoyuki Haba, Yasuhiro Shimizu, Toshifumi Yamada
We investigate the cosmological phase transition dynamics in a supersymmetric left-right symmetric model based on the gauge group $SU(3)_C \times SU(2)_L \times SU(2)_R \times U(1)…
Freeze-in and freeze-out production of Higgs portal Majorana fermionic dark matter during and after reheating
Rajesh Mondal, Sourav Mondal, Toshifumi Yamada
In this paper, we investigate the production of Majorana fermionic dark matter (DM) via the Higgs portal, considering both freeze-in and freeze-out mechanisms during and after the…
Non-thermal baryogenesis from MSSM flat direction
Naoyuki Haba, Yasuhiro Shimizu, Yoshihiro Tanabe +1
We study an inflection point inflation scenario where a flat direction of the minimal supersymmetric standard model (MSSM) is identified with the inflaton. We focus on the case whe…
Indirect Detection for Higgs Portal Majorana Fermionic Dark Matter
Naoyuki Haba, Junpei Ikemoto, Shimizu Yasuhiro +1
We study the -ray signal emitted from dark matter (DM) pair annihilation in the Higgs portal Majorana fermion DM model. In the model, a Majorana fermion DM couples with the…