Proton Decay in Supersymmetric GUT Models

Details Proton Decay in Supersymmetric GUT Models Proton Decay in Supersymmetric GUT Models

2004-07-15

arxiv.org/abs/hep-ph/0407173v3

Mod.Phys.Lett. A19 (2004) 2155

Physics

High Energy Physics

High Energy Physics - Phenomenology

DESY report number corrected

Scientific paper

10.1142/S0217732304015452

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.

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