# ${{\boldsymbol K}^{0}}$ MEAN SQUARE CHARGE RADIUS INSPIRE search

VALUE (fm${}^{2}$) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ -0.077 \pm0.010}$ OUR AVERAGE
$-0.077$ $\pm0.007$ $\pm0.011$ 5037
 2006
KTEV ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit e}^{+}}{{\mathit e}^{-}}$
$-0.090$ $\pm0.021$
 2003 C
NA48 ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit e}^{+}}{{\mathit e}^{-}}$
$-0.054$ $\pm0.026$
 1978
${{\mathit K}_{{S}}}$ regen. by electrons
• • • We do not use the following data for averages, fits, limits, etc. • • •
$-0.087$ $\pm0.046$
 1979
VMD + dispersion relations
$-0.050$ $\pm0.130$
 1969 B
${{\mathit K}_{{S}}}$ regen. by electrons
References:
 ABOUZAID 2006
PRL 96 101801 Measurement of the ${{\mathit K}^{0}}$ Charge Radius and a $\mathit CP$-Violating Asymmetry and a Search for $\mathit CP$-Violating $\mathit E$1 Direct Photon Emission in the Rare Decay ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit e}^{+}}{{\mathit e}^{-}}$
 LAI 2003C
EPJ C30 33 Investigation of ${{\mathit K}_{{L,S}}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ Decays
 BLATNIK 1979
LNC 24 39 The Isovector Part of the Kaon Form-factor and the Kaon Charge Radii
 MOLZON 1978
PRL 41 1213 ${{\mathit K}_S^0}$ Regeneration on Electrons from 30 to 100 ${\mathrm {GeV/}}\mathit c$: a Measurement of the ${{\mathit K}^{0}}$ Radius
 FOETH 1969B
PL 30B 276 Search for Coherent Regeneration from Electrons $−$ the ${{\mathit K}^{0}}$ Charge Radius