#### ${{\mathit \Sigma}^{-}}$ DECAY PARAMETERS

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 Older, outdated results have been omitted.

#### TRIPLE CORRELATION COEFFICIENT $\mathit D$ for ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$

The coefficient $\mathit D$ of the term $\mathit D$ $\mathbf {P}\cdot{}(\mathbf {\hat{{\mathit p}}}_{{{\mathit e}} }{\times }\mathbf {\hat{{\mathit p}}}_{{{\mathit \nu}} }$) in the ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}}$ decay angular distribution. A nonzero value would indicate a violation of time-reversal invariance.
VALUE EVTS DOCUMENT ID TECN  COMMENT
$0.11$ $\pm0.10$ 50k
 1988
SPEC ${{\mathit \Sigma}^{-}}$ 250 GeV
Conservation Laws:
TIME REVERSAL ($\mathit T$) INVARIANCE
References:
 HSUEH 1988
PR D38 2056 High Precision Measurement of Polarized ${{\mathit \Sigma}^{-}}$ $\beta$ Decay