Fig. 3

The allowed region of the masses of supersymmetric particles is indicated by the blue area in the m₀, m_½ plane, where m₀(m_½) are the grand unification scale masses of the spin-0 (1/2) SUSY particles. The EGRET data require low m½ values, which implies values of m₀ in the tera-electron-volt range, if all constraints from the Higgs limit (m_h), g-2 and the b →sγ branching ratio are considered (limits exclude regions to the left). The correct relic density prefers large values of tan β (the ratio of vacuum expectation values of the two Higgs fields) for these mass parameters, typically above 50.

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