${{\boldsymbol A}_{{S}}}$ = [ $\Gamma\mathrm {( {{\boldsymbol K}_S^0} \rightarrow {{\boldsymbol \pi}^{-}} {{\boldsymbol e}^{+}} {{\boldsymbol \nu}_{{e}}} )} - \Gamma\mathrm {( {{\boldsymbol K}_S^0} \rightarrow {{\boldsymbol \pi}^{+}} {{\boldsymbol e}^{-}} {{\overline{\boldsymbol \nu}}_{{e}}} )}$ ] $/$ SUM
INSPIRE search
Such asymmetry violates $\mathit CP$. If $\mathit CPT$ is assumed then ${{\mathit A}_{{S}}}$ = 2 Re($\epsilon $).
