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

Summed over particle and antiparticle, when appropriate.

# $\langle{}\boldsymbol N_{{{\boldsymbol \eta}^{\,'}}}\rangle{}$ INSPIRE search

VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.17 \pm0.05}$ OUR AVERAGE  Error includes scale factor of 2.4.
$0.14$ $\pm0.01$ $\pm0.02$
 1998 A
OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
$0.25$ $\pm0.04$ 1
 1997 D
L3 ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
• • • We do not use the following data for averages, fits, limits, etc. • • •
$0.068$ $\pm0.018$ $\pm0.016$ 2
 1992 D
ALEP ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
1  ACCIARRI 1997D obtain this value averaging over the two decay channels ${{\mathit \eta}^{\,'}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}}$ and ${{\mathit \eta}^{\,'}}$ $\rightarrow$ ${{\mathit \rho}^{0}}{{\mathit \gamma}}$ .
2  BUSKULIC 1992D obtain this value for $\mathit x>0.1$.
References:
 ACKERSTAFF 1998A
EPJ C5 411 Photon and Light Meson Production in Hadronic ${{\mathit Z}^{0}}$ Decays
 ACCIARRI 1997D
PL B393 465 Measurement of Inclusive ${{\mathit \omega}}$ and ${{\mathit \eta}^{\,'}}$ Production in Hadronic ${{\mathit Z}}$ Decays
 BUSKULIC 1992D
PL B292 210 Measurement of the Production Rates of ${{\mathit \eta}}$ and ${{\mathit \eta}^{\,'}}$ in Hadronic ${{\mathit Z}^{0}}$ Decays