${{\boldsymbol \Sigma}^{-}}$ DECAY PARAMETERS

See the ``Note on Baryon Decay Parameters'' in the neutron Listings. Older, outdated results have been omitted.

$\boldsymbol f_{2}(0)/\boldsymbol f_{1}$(0) FOR ${{\boldsymbol \Sigma}^{-}}$ $\rightarrow$ ${{\boldsymbol n}}{{\boldsymbol e}^{-}}{{\overline{\boldsymbol \nu}}_{{e}}}$ INSPIRE search

The signs have been changed to be in accord with our conventions, given in the ``Note on Baryon Decay Parameters'' in the neutron Listings.
VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 0.97 \pm0.14}$ OUR AVERAGE
$+0.96$ $\pm0.07$ $\pm0.13$ 50k
HSUEH
1988
SPEC ${{\mathit \Sigma}^{-}}$ 250 GeV
$+1.02$ $\pm0.34$ 4456
BOURQUIN
1983C
SPEC SPS hyperon beam
  References:
HSUEH 1988
PR D38 2056 High Precision Measurement of Polarized ${{\mathit \Sigma}^{-}}$ $\beta $ Decay
BOURQUIN 1983C
ZPHY C21 17 Measurements of Hyperon Semileptonic Decays at the CERN Super Proton Synchrotron. 3. The ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ Decay Mode