#### ${{\mathit \Xi}^{0}}$ DECAY PARAMETERS

See the Note on Baryon Decay Parameters'' in the neutron Listings.

#### $\mathit g_{1}(0)/\mathit f_{1}$(0) FOR ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$

VALUE EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 1.22 \pm0.05}$ OUR AVERAGE
$1.21$ $\pm0.05$
 2013
NA48 ${{\mathit p}}$ ${}^{}\mathrm {Be}$, 400 GeV
$1.32$ ${}^{+0.21}_{-0.17}$ $\pm0.05$ 487 1
 2001 I
KTEV ${{\mathit p}}$ nucleus, 800 GeV
• • We do not use the following data for averages, fits, limits, etc. • •
$1.20$ $\pm0.04$ $\pm0.03$ 6520 2
 2007
NA48 See BATLEY 2013
 1 ALAVI-HARATI 2001I assumes here that the second-class current is zero and that the weak-magnetism term takes its exact SU(3) value.
 2 This BATLEY 2007 result uses our 2006 value of ${\it V}_{\it us}$ from semileptonic kaon decays as input.
References:
 BATLEY 2013
PL B720 105 Measurement of the Branching Ratio of the Decay ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit \mu}^{-}}{{\overline{\mathit \nu}}_{{\mu}}}$
 BATLEY 2007
PL B645 36 Measurement of the Branching Ratios of the Decays ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ and ${{\overline{\mathit \Xi}}^{0}}$ $\rightarrow$ ${{\overline{\mathit \Sigma}}^{+}}{{\mathit e}^{+}}{{\mathit \nu}_{{e}}}$
 ALAVI-HARATI 2001I
PRL 87 132001 First Measurement of Form Factors of the Decay ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$