D-wave quarkonium levels of the Υ family

A key test of the nonrelativistic potential description of quarkonium is the confirmation of predicted D-wave levels. For the bb-bar system (Υ family), the lowest spin-triplet levels (1 3D) are expected to lie in the range 10 157 +- 10 MeV/c2 and the next set of levels is expected in the range 10 441 +- 10 MeV/c2. Predictions are made for electric dipole transitions involving these levels, and specific suggestions are made for their observation. The most favorable decay chain appears to be Υ(3S)→γ1+2P→γ1+γ2+1D→γ1+γ2+γ3+1P, where γ1 and γ2 have energies of about 100 MeV and E/sub γ//sub =/≅250 MeV. Angular distributions of these photons are discussed