$\mathit CP$ VIOLATION PARAMETERS

$\mathit C$ ( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ )

INSPIRE   PDGID:
S042CK2
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ -0.21 \pm0.20}$ OUR AVERAGE
$-0.28$ $\pm0.21$ $\pm0.04$ 1
YUSA
2019
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.23$ $\pm0.52$ $\pm0.13$
AUBERT
2007AQ
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Reports value of $\mathit A$ which is equal to $−\mathit C$.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
YUSA 2019
PR D99 011102 Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays
AUBERT 2007AQ
PR D76 071101 Measurement of $\mathit CP$ Asymmetry in ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ Decays