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VOLUME 31 (1980) | ISSUE 12 | PAGE 781
Superheavy fermions and proton lifetime
The grand unification models can contain superheavy fermions (m ~ 1015 GeV) in addition to superheavy vector and scalar bosons. An introduction of multiplets with such fermions changes the unification energy and the proton lifetime (τρ). Specifically, it makes it possible to increase τρ in the SUS model by two to three orders of magnitude.