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

Summed over particle and antiparticle, when appropriate.

$\langle{}\mathit N_{{{\mathit \eta}}}\rangle{}$

INSPIRE   PDGID:
S044ETA
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 1.01 \pm0.08}$ OUR AVERAGE  Error includes scale factor of 1.3.  See the ideogram below.
$1.20$ $\pm0.04$ $\pm0.11$
HEISTER
2002C
 ALEP ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
$0.97$ $\pm0.03$ $\pm0.11$
ACKERSTAFF
1998A
 OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
$0.93$ $\pm0.01$ $\pm0.09$
ACCIARRI
1996
L3 ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV

           $\langle{}\mathit N_{{{\mathit \eta}}}\rangle{}$
References:
HEISTER 2002C
PL B528 19 Inclusive Production of the ${{\mathit \omega}}$ and ${{\mathit \eta}}$ Mesons in ${{\mathit Z}}$ Decays, and the Muonic Branching Ratio of the ${{\mathit \omega}}$
ACKERSTAFF 1998A
EPJ C5 411 Photon and Light Meson Production in Hadronic ${{\mathit Z}^{0}}$ Decays
ACCIARRI 1996
PL B371 126 Measurement of ${{\mathit \eta}}$ Production in Two and Three Jet Events from Hadronic ${{\mathit Z}}$ Decays at LEP