Abstract
The Crystal Ball detector at SPEAR has been used to investigate the decays ψ′→γγJψ, Jψ→(e+e− or μ+μ−) resulting from production of 8×105ψ′. From this selection of the data we measure the branching ratios for the processes ψ′→(η or π0)Jψ and ψ′→γχ, χ→γJψ. An analysis of the angular correlations in the latter process furnishes measurements of the χ(3.55) and χ(3.51) spins and of the multipole structure of the radiative transitions.Received 9 December 1981DOI:https://doi.org/10.1103/PhysRevD.25.2259©1982 American Physical Society
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