The proton is not decaying as fast as the simplest unified field theory—SU(5)—predicts. But this is no cause for despair: the search should be for something even simpler.
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Walgate, R. Nature is not all that malicious. Nature 304, 483 (1983). https://doi.org/10.1038/304483a0
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DOI: https://doi.org/10.1038/304483a0
