6 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…
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…
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…
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…