Cross section measurements of the processes $e^{+}{e}^{-}\to \ddot{I}‰\ddot{I}{€}^0$ and $\ddot{I}‰\hat{I}\cdot$ at center-of-mass energies between 3.773 and 4.701 GeV

Abstract

The Born cross sections of the processes $e^{+}{e}^{-}\to \ddot{I}‰\ddot{I}{€}^0$ and $e^{+}{e}^{-}\to \ddot{I}‰\hat{I}\cdot$ are measured at center-of-mass energies between 3.773 and 4.701 GeV using a total integrated luminosity of 22.7 fb${}^{-1}$ collected with the BESIII detector operating at the BEPCII collider. A simple $s^{-n}$ dependence for the continuum process can describe the measured Born cross sections. No significant contributions from the $\ddot{I}ˆ(4160)$, $Y(4230)$, $Y(4360)$, $\ddot{I}ˆ(4415)$, $Y(4660)$ resonances are found, which indicates relative small branching fractions for these resonances into the $\ddot{I}‰\ddot{I}{€}^0$ and $\ddot{I}‰\hat{I}\cdot$ final states.

18 pages, 11 figures. arXiv admin note: text overlap with arXiv:2102.00644