2003/03/25 by Nobuhiro Maekawa, T. Yamashita, Toshifumi Yamashita · 2 citations
Physics and Astronomy · #Coupling (piping) #Coupling constant #Dark Matter and Cosmic Phenomena #Discrete symmetry #Gauge (firearms) #Gauge symmetry #Gauge theory #Grand Unified Theory #Hidden sector #Higgs boson #Higgs sector #Homogeneous space #Neutrino Physics Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton decay #Simple (philosophy) #Standard Model (mathematical formulation) #Supersymmetry #Symmetry (geometry) #Theoretical physics #Unification #hep-ph
paper · pdf · doi:10.1143/ptp.110.93
published as Prog.Theor.Phys. 110 (2003) 93-105 · 15 pages
arxiv created 2003/03/25 · openalex publication_date 2003/03/25 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose simpler Higgs sectors in E6 grand unified theory with anomalous U(1)A gauge symmetry than the previous model in Ref.1). As in the previous model, the doublet-triplet splitting can be realized in a natural way, while proton decay via dimension 5 operators is suppressed and gauge coupling unification is also realized without fine-tuning. Combining the matter sector, simple complete GUTs can be obtained. Since the Higgs sector is simpler, the gauge coupling constant at the cutoff scale can be in perturbative region, and therefore, the estimated value of the lifetime of a nucleon in this model, τp(p→ e+π0)∼ 5× 1033 years, becomes more reliable.