Search for $e^{+}{e}^{-}\to \ddot{I}•\ddot{I}{‡}_{c0}$ and $\ddot{I}•\hat{I}{\cdot }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV

Abstract

Utilizing a data set of $6.7$ fb${}^{-1}$ from electron-positron collisions recorded by the BESIII detector at the BEPCII storage ring, a search is conducted for the processes $e^{+}{e}^{-}\to \ddot{I}•\ddot{I}{‡}_{c0}$ and $\ddot{I}•\hat{I}{\cdot }_{c2}(1D)$ across center-of-mass energies from 4.47 to 4.95 GeV. In the absence of any significant signals, upper limits are set. These include limits on the Born cross sections for $e^{+}{e}^{-}\to \ddot{I}•\ddot{I}{‡}_{c0}$, as well as the product of the Born cross section for $e^{+}{e}^{-}\to \ddot{I}•\hat{I}{\cdot }_{c2}(1D)$ and a sum of five branching fractions. Furthermore, the product of the electronic width of $Y(4660)$ and the branching fraction of the $Y(4660)\to \ddot{I}•\ddot{I}{‡}_{c0}$, denoted as $\hat{I}{“}_{e^{+}{e}^{-}}^{Y(4660)}{\mathcal{B}}_{Y(4660)\to \ddot{I}•\ddot{I}{‡}_{c0}}$, is determined to be $<0.40$ eV at the 90\% confidence level.

14 pages, 6 figures