$\mathit CP$ VIOLATION TESTS IN ${{\mathit K}^{\pm}}$ DECAYS

$\Delta $ = ($\Gamma\mathrm {({{\mathit K}^{+}} )}$ $−$ $\Gamma\mathrm {({{\mathit K}^{-}} )}$) $/$ ($\Gamma\mathrm {({{\mathit K}^{+}} )}$ + $\Gamma\mathrm {({{\mathit K}^{-}} )}$)

$\Delta $( ${{\mathit K}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ ) RATE DIFFERENCE/SUM

INSPIRE  
VALUE ($ 10^{-3} $) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 0.0 \pm1.2}$ OUR AVERAGE
$0.0$ $\pm1.0$ $\pm0.6$ 1M 1
BATLEY
2010A
 NA48
$4$ $\pm29$ 2461
SMITH
1976
WIRE $\pm{}$ E$_{{{\mathit \pi}} }$ 55$-$90 MeV
$5$ $\pm20$ 4000
ABRAMS
1973B
 ASPK $\pm{}$ E$_{{{\mathit \pi}} }$ 51$-$100 MeV
1  This value implies the upper bound for this asymmetry $1.5 \times 10^{-3}$ at 90$\%$ CL.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
BATLEY 2010A
EPJ C68 75 Measurement of the Direct Emission and Interference Terms and Search for $\mathit CP$ Violation in the Decay ${{\mathit K}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
SMITH 1976
NP B109 173 A Search for $\mathit CP$ Violation in ${{\mathit K}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ Decays
ABRAMS 1973B
PRL 30 500 Test of $\mathit CP$ Noninvariance in the Decay ${{\mathit K}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$