#### ${{\boldsymbol \Xi}^{-}}$ DECAY PARAMETERS

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

#### ${\boldsymbol g}_{{{\boldsymbol A}}}$ $/$ ${\boldsymbol g}_{{{\boldsymbol V}}}$ FOR ${{\boldsymbol \Xi}^{-}}$ $\rightarrow$ ${{\boldsymbol \Lambda}}{{\boldsymbol e}^{-}}{{\overline{\boldsymbol \nu}}_{{e}}}$

VALUE EVTS DOCUMENT ID TECN  COMMENT
$-0.25$ $\pm0.05$ 1992 1
 1983
SPEC SPS hyperon beam
 1 BOURQUIN 1983 assumes that $\mathit g_{2}$ = 0. Also, the sign has been changed to agree with our conventions, given in the “Note on Baryon Decay Parameters” in the neutron Listings.
References:
 BOURQUIN 1983
ZPHY C21 1 Measurements of Hyperon Semileptonic Decays at the CERN Super Proton Synchrotron. 2. The ${{\mathit \Lambda}}$ $\rightarrow$ ${{\mathit p}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ , ${{\mathit \Xi}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ , and ${{\mathit \Xi}^{-}}$ $\rightarrow$ ${{\mathit \Sigma}^{0}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ Decay Modes