Measurements of the cross sections of $e^{+}e^{-}\to Σ_{c}\barΣ_{c}$ and $Λ_c^{+}\barΣ_{c}^{-}$ near kinematic thresholds

Based on $e^{+}e^{-}$ annihilation data collected with the BESIII detector at the BEPCII collider, searches for the $e^{+}e^{-}\toΣ_{c}\barΣ_{c}$ ($Σ_{c}^{+}\barΣ_{c}^{-}$, $Σ_{c}^{0}\barΣ_{c}^{0}$ and $Σ_{c}^{++}\barΣ_{c}^{--}$) processes, as well as for the isospin-violating process $e^{+}e^{-}\toΛ_c^{+}\barΣ_{c}^{-}$, are conducted for the first time at $\sqrt{s}=4.750$, $4.781$, $4.843$, $4.918$, and $4.951$ GeV. As no signals are observed for all the above channels, the upper limits on their Born cross sections at the 90$\%$ confidence level are reported.