233 citations · 3.1k across the 168 of their papers we have counts for
168 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)…
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…
Proton Decay and Gauge Coupling Unification in an Extended SU(5) GUT with 45-Dimensional Higgs
Naoyuki Haba, Keisuke Nagano, Yasuhiro Shimizu +1
We present a comprehensive study of an extended SU(5) grand unified theory (GUT) that incorporates a 45-dimensional Higgs representation to address the shortcomings of the minimal…