Limits on Split Supersymmetry from Gluino Cosmology

Phys. Rev. D 72 (2005) 075011

Derives an upper limit on scalar superpartner masses in split supersymmetry from big bang nucleosynthesis constraints on long-lived gluinos. A TeV-mass gluino must decay within 100 seconds, setting the SUSY breaking scale below 10^9 GeV.