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 ⁶Li. This sets an upper limit on the supersymmetry breaking scale mS of 10⁹ GeV.
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Arvanitaki et al. (2005) studied this question.
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