Limits on Split Supersymmetry from Gluino Cosmology
  An upper limit on the masses of scalar superpartners in split supersymmetry is found by considering cosmological constraints on long-lived gluinos. Over most of parameter space, the most stringent constraint comes from big bang nucleosynthesis. A TeV mass gluino must have a lifetime of less than 100 seconds to avoid altering the abundances of D and Li-6. This sets an upper limit on the supersymmetry breaking scale of 10^9 GeV. 
A. Arvanitaki, C. Davis, P. W. Graham, A. Pierce, J. G. Wacker