Search for $Z_c(3900{)}^{\pm }\to \ddot{I}‰\ddot{I}{€}^{\pm }$

Abstract

The decay $Z_c(3900{)}^{\pm }\to \ddot{I}‰\ddot{I}{€}^{\pm }$ is searched for using data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies $\sqrt{s}=4.23$ and $4.26$~GeV. No significant signal for the $Z_c(3900{)}^{\pm }$ is found, and upper limits at the 90\% confidence level on the Born cross section for the process $e^{+}{e}^{-}\to Z_c(3900{)}^{\pm }\ddot{I}{€}^{\mp }\to \ddot{I}‰\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ are determined to be $0.26$ and $0.18$ pb at $\sqrt{s}=4.23$ and 4.26 GeV, respectively.

7 pages, 3 figures