chi-b(1 PJ,2 PJ)衰变为轻强子的观测
Observation of chi-b(1PJ,2PJ) decays to light hadrons
摘要:
分析$Υ(nS)$衰变获得的CLEO探测器在CESR $e^+e^-$对撞机上运行,我们测量的第一次产品分支分数${\cal B}[Υ(nS)\toγχ_{b}((n-1)P_J)] \times {\cal B}[χ_{b}(n-1)P_J)\to X_i]$ $n=2$和3,其中$X_i$表示,对于每个$i$,14个排他性的轻强子的最终状态之一,我们观察到显着的信号在$χ_b(1P_J)$和$χ_b(2P_J)$衰变。我们还确定上限的电偶极子(E1)过渡$Υ(3S) \to γχ_b(1P_J)$。
英文摘要:
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 ${\cal B}[Υ(nS)\toγχ_{b}((n-1)P_J)] \times {\cal B}[χ_{b}(n-1)P_J)\to X_i]$ 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 $χ_b(1P_J)$ and $χ_b(2P_J)$ decays. We also determine upper limits for the electric dipole (E1) transitions $Υ(3S) \to γχ_b(1P_J)$.
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