Analyzing $Upsilon(nS)$ decays acquired with the CLEO detector operating at the CESR $e^+e^-$ collider, we measure for the first time the product branching fractions ${cal B}[Upsilon(nS)togammachi_{b}((n-1)P_J)] times {cal B}[chi_{b}(n-1)P_J)to X_i]$ for $n=2$ and 3, where $X_i$ denotes, for each $i$, one of the fourteen exclusive light-hadron final states for which we observe significant signals in both $chi_b(1P_J)$ and $chi_b(2P_J)$ decays. We also determine upper limits for the electric dipole (E1) transitions $Upsilon(3S) to gamma chi_b(1P_J)$.
تحميل البحث