AVERAGE PARTICLE MULTIPLICITIES IN HADRONIC ${{\mathit Z}}$ DECAY

Summed over particle and antiparticle, when appropriate.

$\langle{}\mathit N_{{{\mathit \Sigma}^{+}} + {{\mathit \Sigma}^{-}}}\rangle{}$

INSPIRE   PDGID:
S044SIC
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.181 \pm0.018}$ OUR AVERAGE
$0.182$ $\pm0.010$ $\pm0.016$ 1
ALEXANDER
1997E
 OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
$0.170$ $\pm0.014$ $\pm0.061$
ABREU
1995O
 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