Two-gluino bound states

Abstract

We estimate the branching ratio and argue that two-gluino bound states can be detected in ϒ→γ+¹S₀(g^~ g^~) if m_g^~<4.5 GeV. The signal would be comparable to the backgrounds in magnitude. In the case of top-quarkonium decay, the signal could be much enhanced due to the exchange of a possibly light scalar top quark. We also show that two-gluino bound states can exist only in ¹S₀,³P_0,1,2, ¹D₂, ³F_2,3,4,..., but not in ³S₁, ¹P₁, ³D_1,2,3, ¹F₃,... states. The decay width of the g^~ g^~ ground state is calculated. Finally, we discuss the g^~g^~ potential.