2004/07/31 by S. Wiesenfeldt, SÖREN WIESENFELDT · 10 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Branching fraction #Exponential decay #Orbifold #Particle decay #Particle physics theoretical and experimental studies #Proton #Proton decay #Quantum Chromodynamics and Particle Interactions #SO(10) #Yukawa potential #hep-ex #hep-ph
paper · pdf · doi:10.1142/s0217732304015452
published in Modern Physics Letters A 19(29), 2155-2169 (World Scientific) · DESY report number corrected
openalex publication_date 2004/09/16 · arxiv created 2004/09/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The instability of protons is a crucial prediction of supersymmetric GUTs. We review the decay in minimal supersymmetric SU (5), which is dominated by dimension-five operators, and discuss the implications of the failure of Yukawa unification for the decay rate. In a consistent SU (5) model, where SU (5) relations among Yukawa couplings hold, the proton decay rate can be several orders of magnitude smaller than the present experimental bound. Finally, we discuss orbifold GUTs, where proton decay via dimension-five operators is absent. The branching ratios of dimension-six decay can significantly differ from those in four dimensions.