5 citations · 11 across the 9 of their papers we have counts for
9 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…
Confronting MSSM flat direction inflation with Planck/BICEP data
Naoyuki Haba, Yasuhiro Shimizu, Yoshihiro Tanabe +1
We study the scenario of inflection point inflation where a flat direction of the minimal supersymmetric standard model (MSSM) is identified with the inflaton. Specifically, we con…
Gauge coupling unification and proton decay via 45 Higgs boson in SU(5) GUT
Naoyuki Haba, Keisuke Nagano, Yasuhiro Shimizu +1
We study the gauge coupling unification (GCU) and proton decay in a non-supersymmetric SU(5) grand unified theory (GUT) incorporating a 45 representation Higgs field. Our analysis…
Higgs Portal Majorana Fermionic Dark Matter with the Freeze-in Mechanism
Junpei Ikemoto, Naoyuki Haba, Shimizu Yasuhiro +1
We consider a minimal model of fermionic dark matter, in which the Majorana fermion dark matter (DM) couples with the Standard Model (SM) Higgs field through a higher-dimen…