Abstract
The SU(5) Georgi-Glashow [1] model provided much of the motivation for ongoing proton decay experiments as well as a theoretical framework for estimating expected rates and branching ratios. In the so-called “minimal” model, one assumes the existence of a “great desert”, i.e. no new particles up to mX, the unification mass scale. This simplistic assumption has an appealing consequence; it leads to rather definite predictions. If those predictions turn out to be wrong, it doesn’t necessarily imply that the concept of grand unification or even that the SU(5) model is invalid. Instead, it would most likely suggest that new physics populates the desert and modifies the predictions.
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Marciano, W.J. (1983). Proton Decay Theory. In: Weldon, H.A., Langacker, P., Steinhardt, P.J. (eds) Fourth Workshop on Grand Unification. Progress in Physics, vol 9. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4757-1812-6_3
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DOI: https://doi.org/10.1007/978-1-4757-1812-6_3
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