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 $e^+e^-\to K^-\bar{ \Xi}^+\Lambda/\Sigma^{ 0}$ at thirty-five energy points with a partial-reconstruction strategy. By fitting the dressed cross sections of $e^+e^-\to K^-\bar{ \Xi}^+\Lambda/\Sigma^{ 0}$, evidence for $\psi(4160) \to K^{ -}\bar\Xi^{ +}\Lambda$ is found for the first time with a significance of 4.4$\sigma$, 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 $K^{ -}\bar\Xi^{ +}\Lambda/\Sigma^{ 0}$ are determined.
Categories: hep-ex