Low (alpha)(sub s) and its consequences for unified model building

摘要

We review various ways of obtaining consistency between the idea of supersymmetric grand unification and an apparent low value of (alpha)(sub s) (approx) 0.112 indicated by several low energy experiments. We argue that to reconcile the low value of (alpha)(sub s) with the predictions of supersymmetric GUTs, we need to go beyond the standard minimal supersymmetric GUT scenario and invoke new physics either at 10(sup 11) - 10(sup 12) GeV, or at the GUT scale. (author). 35 refs, 3 figs, 4 tabs. (Atomindex citation 27:020601)