Search for supersymmetry in toponium decays

Although cosmology and unification suggest that the mass of the gluino is larger than about 14 GeV, in many theories of broken supersymmetry the photino γ, gluino g and one of the spin-zero partners t of the t quark can be lighter than m_t- We calculate the decay rates for toponium →gg, γγ and tt and show that in many models they can be as large as, or larger than, the rate for toponium →e⁺e^- decay. If it is kinematically accesible, the decay t→t + γ dominates the decays of toponium as well as those of naked top states.