2003/03/31 by Masahiro Ibe, Taizan Watari, T. Watari · 14 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Combinatorics #Dimension (graph theory) #Gauge group #Gauge theory #Geometry #Grand Unified Theory #Higgs boson #Mathematics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Product (mathematics) #Proton #Proton decay #Quantum Chromodynamics and Particle Interactions #Supersymmetry #Symmetry group #hep-ph
paper · pdf · doi:10.1103/physrevd.67.114021
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 67(11) (American Physical Society) · 36 pages, including 4 tables and 5 figures, minor corrections
arxiv created 2003/04/24 · openalex publication_date 2003/06/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Models of supersymmetric grand unified theories based on the SU(5)GUT\ifmmode×\else\texttimes\fiU(N)H gauge group (N=2,3) have a symmetry that guarantees light Higgs doublets and the absence of dimension-5 proton-decay operators. We analyze the proton decay induced by the gauge-boson exchange in these models. Upper bounds on the proton lifetime are obtained: \ensuremathτ(\stackrel\ensuremath→p\ensuremathπ0e+)\ensuremath\lesssim6.0\ifmmode×\else\texttimes\fi1033yr in the SU(5)GUT\ifmmode×\else\texttimes\fiU(2)H model and \ensuremathτ(\stackrel\ensuremath→p\ensuremathπ0e+)\ensuremath\lesssim5.3\ifmmode×\else\texttimes\fi1035yr in the SU(5)GUT\ifmmode×\else\texttimes\fiU(3)H model. Various uncertainties in the predictions are also discussed.