# $\vert \eta _{000}\vert$ = $\vert \boldsymbol A$( ${{\boldsymbol K}_S^0}$ $\rightarrow$ 3 ${{\boldsymbol \pi}^{0}}$ )/$\boldsymbol A$( ${{\boldsymbol K}_L^0}$ $\rightarrow$ 3 ${{\boldsymbol \pi}^{0}}$ )$\vert$ INSPIRE search

A non-zero value violates CP invariance.
VALUE CL% EVTS DOCUMENT ID TECN
$\bf{<0.0088}$ 90 590M
 2013 C
KLOE
• • • We do not use the following data for averages, fits, limits, etc. • • •
$<0.018$ 90 37.8M
 2005 B
KLOE
$<0.045$ 90 4.9M
 2005 A
NA48
Conservation Laws:
 $\mathit CP$ INVARIANCE
References:
 BABUSCI 2013C
PL B723 54 A New Limit on the $\mathit CP$ Violating Decay ${{\mathit K}_S^0}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ with the KLOE Experiment
 AMBROSINO 2005B
PL B619 61 A Direct Search for the $\mathit CP$-Violating Decay ${{\mathit K}_S^0}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ with the KLOE detector at DA$\Phi$NE
 LAI 2005A
PL B610 165 Search for $\mathit CP$ Violation in ${{\mathit K}^{0}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ Decays