Measurement of the cross sections of $e^{+}{e}^{-}\to K^{-}\bar{\hat{I}}{ž}^{+}\hat{I}›/\hat{I}{\pounds }^0$ at center-of-mass energies between 3.510 and 4.914 GeV

Abstract

Using $e^{+}{e}^{-}$ collision data collected with the BESIII detector at the BEPCII collider at center-of-mass energies between 3.510 and 4.914GeV, corresponding to an integrated luminosity of 25 fb${}^{-1}$, we measure the Born cross sections for the process $e^{+}{e}^{-}\to K^{-}\bar{\hat{I}}{ž}^{+}\hat{I}›/\hat{I}{\pounds }^0$ at thirty-five energy points with a partial-reconstruction strategy. By fitting the dressed cross sections of $e^{+}{e}^{-}\to K^{-}\bar{\hat{I}}{ž}^{+}\hat{I}›/\hat{I}{\pounds }^0$, evidence for $\ddot{I}ˆ(4160)\to K^{-}\bar{\hat{I}}{ž}^{+}\hat{I}›$ is found for the first time with a significance of 4.4$\ddot{I}ƒ$, including systematic uncertainties. No evidence for other possible resonances is found. In addition, the products of electronic partial width and branching fraction for all assumed resonances decaying into $K^{-}\bar{\hat{I}}{ž}^{+}\hat{I}›/\hat{I}{\pounds }^0$ are determined.

26 pages,5 tables, 4 figures, consistent with the publication in JHEP07(2024)258