2013/07/01 by M. Kakizaki, Mitsuru Kakizaki
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Extra dimensions #Fermion #Gauge boson #Gauge theory #Grand Unified Theory #Higgs boson #Multiplet #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Proton decay #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spectral line #Theoretical physics #hep-ph
paper · pdf · doi:10.1103/physrevd.88.095017
published as Phys. Rev. D 88, 095017 (2013) · 10 pages, 2 figures
arxiv created 2013/07/01 · openalex publication_date 2013/11/21 · arxiv updated 2013/11/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose an extra-dimensional mechanism that adequately suppresses the rate of proton decay mediated by the X bosons in grand unified theories. The X bosons and their Kaluza-Klein modes are localized in the extra spatial dimensions due to the kink configuration of the adjoint Higgs multiplet that is responsible for the spontaneous breaking of the unified gauge group while the standard model gauge bosons freely propagate in the bulk. By localizing fermion multiplets apart from the X bosons in the extra dimensions, the resulting four-dimensional couplings that give rise to proton decay are exponentially suppressed, leading to the longevity of the proton even when the mass scale of the X bosons is much lower than the usual unification scale.