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

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

INSPIRE   PDGID:

S014A1

Measurements with an error $>$ $1.0 \times 10^{-2}$ 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 2008 D 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 1968 C 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

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