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

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

$\phi _{0}$ ANGLE FOR ${{\boldsymbol \Sigma}^{+}}$ $\rightarrow$ ${{\boldsymbol p}}{{\boldsymbol \pi}^{0}}$ ($\phi _{0}$ = $\beta /\gamma $) INSPIRE search

VALUE ($^\circ{}$) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 36 \pm34}$ OUR AVERAGE
$38.1$ ${}^{+35.7}_{-37.1}$ 1259 1
LIPMAN
1973
OSPK ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit K}^{+}}$
$22$ $\pm90$ 2
HARRIS
1970
OSPK ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}^{+}}{{\mathit K}^{+}}$
1  Decay proton 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 ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{0}}$
HARRIS 1970
PRL 24 165 Proton Polarization in ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{0}}$