Reconciling supersymmetric grand unification with αs(mZ)≈0.11

L. Roszkowski, M. Shifman

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


We argue that supersymmetric grand unification of gauge couplings is not incompatible with small αs, even without large GUT-scale corrections, if one relaxes a usual universal gaugino mass assumption. A commonly assumed relation M2 ≃ mgluino/3 is in gross contradiction with αs ≈ 0.11. Instead, a small αs favors M2 > mgluino. If this is indeed the case our observation casts doubt on another commonly used relation M1≃0.5M2 which originates from the same constraint of a common gaugino mass at the GUT scale. One firm prediction emerging within the small αs scenario with the unconstrained gaugino masses is the existence of a relatively light gluino below ∼200\GeV.

Original languageEnglish (US)
Pages (from-to)404-412
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
StatePublished - 1996


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