PARAMETERS for ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ DECAY

$\vert $g$_{E1}\vert $ for ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$

INSPIRE   PDGID:
S013GE1
This parameter is the amplitude of the direct emission of a $\mathit CP$ violating E1 electric dipole photon.
VALUE CL% EVTS DOCUMENT ID TECN  COMMENT
$\bf{<0.21}$ 90 111k
ABOUZAID
2006A
 KTEV $\mathit E{}^{*}_{{{\mathit \gamma}}}$ $>$ 20 MeV
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
ABOUZAID 2006A
PR D74 032004 Measurement of Direct Photon Emission in the ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ Decay Mode
Also
PR D74 039905 (errat.) Publisher's Note: ABOUZAID 2006A Measurement of Direct Photon Emission in the ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ Decay Mode