Measurement of the cross sections of e⁺e⁻→ K⁻Ξ̄⁺Λ /Σ⁰ at center-of-mass energies between 3.510 and 4.914 GeV

A bstract Using e + e − collision data collected with the BESIII detector at the BEPCII collider at center-of-mass energies between 3.510 and 4.914 GeV, corresponding to an integrated luminosity of 25 fb − 1 , we measure the Born cross sections for the process e⁺e⁻→ K⁻Ξ̄⁺Λ /Σ⁰ e + e − → K − Ξ ¯ + Λ / Σ 0 at thirty-five energy points with a partial-reconstruction strategy. By fitting the dressed cross sections of e⁺e⁻→ K⁻Ξ̄⁺Λ /Σ⁰ e + e − → K − Ξ ¯ + Λ / Σ 0 , evidence for ψ (4160)→ K⁻Ξ̄⁺Λ ψ 4160 → K − Ξ ¯ + Λ is found for the first time with a significance of 4.4 σ , 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⁻Ξ̄⁺Λ /Σ⁰ K − Ξ ¯ + Λ / Σ 0 are determined.