Analyzing Υ(nS) decays acquired with the CLEO detector operating at
the CESR e+e− collider, we measure for the first time the product branching
fractions B[Υ(nS)→γχb​((n−1)PJ​)]×B[χb​(n−1)PJ​)→Xi​] for n=2 and 3, where Xi​ denotes, for each
i, one of the fourteen exclusive light-hadron final states for which we
observe significant signals in both χb​(1PJ​) and χb​(2PJ​) decays.
We also determine upper limits for the electric dipole (E1) transitions
Υ(3S)→γχb​(1PJ​).Comment: 12 pages, 3 figures, submitted to Phys. Rev. D (Rapid Communications