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

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

$\phi _{+}$ ANGLE FOR ${{\boldsymbol \Sigma}^{+}}$ $\rightarrow$ ${{\boldsymbol n}}{{\boldsymbol \pi}^{+}}$ ($\phi _{+}$ = $\beta /\gamma $) INSPIRE search

VALUE ($^\circ{}$) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 167 \pm20}$ OUR AVERAGE  Error includes scale factor of 1.1.
$184$ $\pm24$ 1054 1
BERLEY
1970B
 HBC
$143$ $\pm29$ 560
BANGERTER
1969B
 HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.4 ${\mathrm {GeV/}}\mathit c$
1  Changed from 176 to 184$^\circ{}$ to agree with our sign convention.
  References:
BERLEY 1970B
PR D1 2015 Decay Parameters in the Nonleptonic Decay Modes of the Charged ${{\mathit \Sigma}}$ Hyperons
BANGERTER 1969B
PR 187 1821 Decay Parameters for ${{\mathit \Sigma}^{\pm}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \pi}^{\pm}}$