The Problem of αs in Supersymmetric Unified Theories
Abstract
It is shown that in SO(10) there is a general connection between the suppression of higgsino mediated proton decay and the value of αs. However, agreement with the experimental value of αs can be obtained if there are relatively large negative threshold corrections to αs coming from superheavy split multiplets. It is shown that such split multiplets can arise in SO(10) without fine-tuning of parameters.
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