${{\boldsymbol \Xi}^{0}}$ DECAY PARAMETERS

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

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

VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1.22 \pm0.05}$ OUR AVERAGE
$1.21$ $\pm0.05$
BATLEY
2013
NA48 ${{\mathit p}}{}^{}\mathrm {Be}$, 400 GeV
$1.32$ ${}^{+0.21}_{-0.17}$ $\pm0.05$ 487 1
ALAVI-HARATI
2001I
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
BATLEY
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 ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$