The Problem of α_s in Supersymmetric Unified Theories

preprint1998arXivOpen access

It is shown that in SO(10) there is a general connection between the suppression of higgsino mediated proton decay and the value of $α_s$ . However, agreement with the experimental value of $α_s$ can be obtained if there are relatively large negative threshold corrections to $α_s$ 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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The Problem of α_s in Supersymmetric Unified Theories

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