Search for the hyperon semileptonic decay ${\Xi }^{-}\to {\Xi }^0{e}^{-}\overline{{\nu }_e}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +507

Using $(10.087\pm 0.044)\times 10^9$ $J/\psi$ events collected by the BESIII detector at the BEPCII collider, we search for the hyperon semileptonic decay $Ξ^{-} \rightarrow Ξ^{0} e^{…