Constraining αs(MZ) from the Hidden Sector
Paul H. Frampton, Bettina Keszthelyi, Brian D. Wright, Thomas W. Kephart
Abstract
By including the effects of superstring thresholds, we reconsider minimal string unification together with the requirement of producing a supersymmetry-breaking gluino condensate in the hidden sector. This gives, for examples of phenomenologically-viable Z8' and other related orbifolds, the constraint that 0.1215 ≤ αs(MZ) ≤ 0.1270. In such models, a hidden photino can be a source of cosmological dark matter detectable by gravitational microlensing.
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