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

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

$\alpha _{0}$ FOR ${{\boldsymbol \Sigma}^{+}}$ $\rightarrow$ ${{\boldsymbol p}}{{\boldsymbol \pi}^{0}}$ INSPIRE search

VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ -0.980 {}^{+0.017}_{-0.015}}$ OUR FIT
$\bf{ -0.980 {}^{+0.017}_{-0.013}}$ OUR AVERAGE
$-0.945$ ${}^{+0.055}_{-0.042}$ 1259 1
LIPMAN
1973
OSPK ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}$
$-0.940$ $\pm0.045$ 16k
BELLAMY
1972
ASPK ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit K}^{+}}$
$-0.98$ ${}^{+0.05}_{-0.02}$ 1335 2
HARRIS
1970
OSPK ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit K}^{+}}$
$-0.999$ $\pm0.022$ 32k
BANGERTER
1969
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.4 ${\mathrm {GeV/}}\mathit c$
1  Decay protons scattered off aluminum.
2  Decay protons scattered off carbon.
  References:
LIPMAN 1973
PL 43B 89 Test of the ${{\mathit \Delta}}\mathit I={1\over 2}$ Rule and the Lee-Sugawara Relation in the Decay ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{0}}$
BELLAMY 1972
PL 39B 299 Polarization in the Reaction ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \Sigma}^{+}}$ at 1.11 ${\mathrm {GeV/}}\mathit c$
HARRIS 1970
PRL 24 165 Proton Polarization in ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{0}}$
BANGERTER 1969
Thesis UCRL 19244 Nonleptonic Decay of ${{\mathit \Sigma}}$ Hyperons