Speaker
Description
Results are presented on $\chi_{b1,2}(2P)\to\omega\Upsilon(1{\mathrm{S}})$ transitions from $e^+e^−\to\Upsilon(3{\mathrm{S}})\to \gamma \chi_{b1,2}(2P)$ decays. The data were collected with the $BABAR$ detector at the PEP-II asymmetric-energy $e^+e^−$ collider at SLAC. The integrated luminosity of the data sample is 28.0 $fb^{−1}$, corresponding to $121.3\times 10^6$ $\Upsilon(3{\mathrm{S}})$ decays. Signals of $\chi_{b1,2}(2P)\to\omega\Upsilon(1{\mathrm{S}})$ are observed over a negligible background. Improved precision measurements of branching fractions are obtained. First measurements of the $\chi_{b1,2}(2P)$ angular distributions are performed. No evidence is found for the presence of a $\chi_{b0}(2P)\to\omega\Upsilon(1{\mathrm{S}})$ decay mode.
| Speaker confirmation | Yes |
|---|