# AVERAGE PARTICLE MULTIPLICITIES IN HADRONIC ${{\boldsymbol Z}}$ DECAY

Summed over particle and antiparticle, when appropriate.

# $\langle{}\boldsymbol N_{{{\boldsymbol \Sigma}^{+}} + {{\boldsymbol \Sigma}^{-}}}\rangle{}$ INSPIRE search

VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.181 \pm0.018}$ OUR AVERAGE
$0.182$ $\pm0.010$ $\pm0.016$ 1
 1997 E
OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
$0.170$ $\pm0.014$ $\pm0.061$
 1995 O
DLPH ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
1  We have combined the values of $\langle{}\mathit N_{{{\mathit \Sigma}^{+}}}\rangle{}$ and $\langle{}\mathit N_{{{\mathit \Sigma}^{-}}}\rangle{}$ from ALEXANDER 1997E adding the statistical and systematic errors of the two final states separately in quadrature. If isospin symmetry is assumed this value becomes $0.174$ $\pm0.010$ $\pm0.015$.
References:
 ALEXANDER 1997E
ZPHY C73 587 ${{\mathit \Sigma}^{+}}$, ${{\mathit \Sigma}^{0}}$, and ${{\mathit \Sigma}^{-}}$ Hyperon Production in Hadronic ${{\mathit Z}^{0}}$ Decays
 ABREU 1995O
ZPHY C67 543 Strange Baryon Production in ${{\mathit Z}^{0}}$ Hadronic Decays