Proton Decay in a Consistent Supersymmetric SU(5) GUT Model

Details Proton Decay in a Consistent Supersymmetric SU(5) GUT Model Proton Decay in a Consistent Supersymmetric SU(5) GUT Model

2003-02-28

arxiv.org/abs/hep-ph/0302272v2

Nucl.Phys.B661:62-82,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 4 figures, uses axodraw.sty; typos corrected, final version to appear in Nucl. Phys. B

Scientific paper

10.1016/S0550-3213(03)00301-8

It is widely believed that minimal supersymmetric SU(5) GUTs have been excluded by the SuperKamiokande bound for the proton decay rate. In the minimal model, however, the theoretical prediction assumes unification of Yukawa couplings, Y_d=Y_e, which is known to be badly violated. We analyze the implications of this fact for the proton decay rate. In a consistent SU(5) model with higher dimensional operators, where SU(5) relations among Yukawa couplings hold, the proton decay rate can be several orders of magnitude smaller than the present experimental bound.

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