B. Brahmachari et Rn. Mohapatra, A LOW ALPHA(5) AND ITS CONSEQUENCES FOR UNIFIED MODEL-BUILDING, International journal of modern physics A, 11(10), 1996, pp. 1699-1713
We review various ways of obtaining consistency between the idea of su
persymmetric grand unification and an apparent low value of alpha(s) s
imilar to 0.112 indicated by several low energy experiments. We argue
that to reconcile the low value of alpha(s) with the predictions of su
persymmetric GUT's, we need to go beyond the standard minimal supersym
metric GUT scenario and invoke new physics either at 10(11)-10(12) GeV
or at the GUT scale.