# ${{\boldsymbol \Sigma}^{-}}$ 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 Older, outdated results have been omitted.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
 1988
SPEC ${{\mathit \Sigma}^{-}}$ 250 GeV
$+1.02$ $\pm0.34$ 4456
 1983 C
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