${{\mathit \eta}}$ $\mathit C$-NONCONSERVING DECAY PARAMETERS

${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ LEFT-RIGHT ASYMMETRY PARAMETER

INSPIRE   PDGID:
S014A1
Measurements with an error $>$ $0.01$ have been omitted.
VALUE ($ 10^{-2} $) EVTS DOCUMENT ID TECN
$\bf{ (90 {}^{+110}_{-120}) \times 10^{-3}}$ OUR AVERAGE
$+0.09$ $\pm0.10$ ${}^{+0.09}_{-0.14}$ 1.34M
AMBROSINO
2008D
 KLOE
$0.28$ $\pm0.26$ 165k
JANE
1974
OSPK
$-0.05$ $\pm0.22$ 220k
LAYTER
1972
ASPK
• • We do not use the following data for averages, fits, limits, etc. • •
$1.5$ $\pm0.5$ 37k , 1
GORMLEY
1968C
 ASPK
1  The GORMLEY 1968C asymmetry is probably due to unmeasured ($\mathbf {E}{\times }$ $\mathbf {B}$) spark chamber effects. New experiments with ($\mathbf {E}{\times }$ $\mathbf {B}$) controls don't observe an asymmetry.
Conservation Laws:
CHARGE CONJUGATION ($\mathit C$) INVARIANCE
References:
AMBROSINO 2008D
JHEP 0805 006 Determination of ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ Dalitz Plot Slopes and Asymmetries with the KLOE Detector
JANE 1974
PL 48B 260 A Measurement of the Charge Asymmetry in the Decay ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
LAYTER 1972
PRL 29 316 Measurement of the Charge Asymmetry in the Decay ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
GORMLEY 1968C
PRL 21 402 Experimental Test of $\mathit C$ Invariance in ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$