${{\boldsymbol \Lambda}}$ DECAY PARAMETERS

See the ``Note on Baryon Decay Parameters'' in the neutron Listings. Some early results have been omitted.

$\alpha _{−}$ FOR ${{\boldsymbol \Lambda}}$ $\rightarrow$ ${{\boldsymbol p}}{{\boldsymbol \pi}^{-}}$ INSPIRE search

VALUE EVTS DOCUMENT ID TECN  COMMENT
$0.750$ $\pm0.009$ $\pm0.004$ 420k
ABLIKIM
2018AG
BES3 ${{\mathit J / \psi}}$ to ${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$0.584$ $\pm0.046$ 8500
ASTBURY
1975
SPEC
$0.649$ $\pm0.023$ 10325
CLELAND
1972
OSPK
$0.67$ $\pm0.06$ 3520
DAUBER
1969
HBC From ${{\mathit \Xi}}$ decay
$0.645$ $\pm0.017$ 10130
OVERSETH
1967
OSPK ${{\mathit \Lambda}}$ from ${{\mathit \pi}^{-}}{{\mathit p}}$
$0.62$ $\pm0.07$ 1156
CRONIN
1963
CNTR ${{\mathit \Lambda}}$ from ${{\mathit \pi}^{-}}{{\mathit p}}$
  References:
ABLIKIM 2018AG
arXiv:1808.08917
ASTBURY 1975
NP B99 30 Measurement of the Differential Cross Section and the Spin Correlation Parameters $\mathit P$, $\mathit A$, and $\mathit R$ in the Backward Peak of ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{0}}{{\mathit \Lambda}}$ at 5 ${\mathrm {GeV/}}\mathit c$
CLELAND 1972
NP B40 221 A Measurement of the $\beta $-Parameter in the Charged Nonleptonic Decay of the ${{\mathit \Lambda}^{0}}$ Hyperon
DAUBER 1969
PR 179 1262 Production and Decay of Cascade Hyperons
OVERSETH 1967
PRL 19 391 Time Reversal Invariance in ${{\mathit \Lambda}}$ Decay
CRONIN 1963
PR 129 1795 Measurement of the Decay Parameters of the ${{\mathit \Lambda}}$ Particle