Search for the ηc2(1D) in e+e−→γηc2(1D) at s near 10.6 GeV at Belle
Citations Over TimeTop 16% of 2021 papers
Abstract
For the first time we search for the ${\ensuremath{\eta}}_{c2}(1D)$ in ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\eta}}_{c2}(1D)$ at $\sqrt{s}=10.52$, 10.58, and 10.867 GeV with data samples of $89.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, and $121.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant ${\ensuremath{\eta}}_{c2}(1D)$ signal is observed in the mass range between 3.8 and $3.88\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. The upper limit at 90% confidence level on the product of the Born cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\eta}}_{c2}(1D)$ and branching fraction for ${\ensuremath{\eta}}_{c2}(1D)\ensuremath{\rightarrow}\ensuremath{\gamma}{h}_{c}(1P)$ is determined to be $\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\eta}}_{c2}(1D))\mathcal{B}({\ensuremath{\eta}}_{c2}(1D)\ensuremath{\rightarrow}\ensuremath{\gamma}{h}_{c}(1P))<4.9\text{ }\text{ }\mathrm{fb}$ at $\sqrt{s}$ near 10.6 GeV.