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Constraining $α_s(M_Z)$ from the Hidden Sector

Paul H. Frampton·Bettina Keszthelyi·Brian D. Wright·Thomas W. Kephart
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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 $Z_8'$ and other related orbifolds, the constraint that $0.1215 \leq α_s(M_Z) \leq 0.1270$. In such models, a hidden photino can be a source of cosmological dark matter detectable by gravitational microlensing.

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Paul H. Frampton, Bettina Keszthelyi, Brian D. Wright, Thomas W. Kephart. 1995-11-29. Constraining $α_s(M_Z)$ from the Hidden Sector. https://arxiv.org/abs/hep-ph/9511445

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