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

Summed over particle and antiparticle, when appropriate.

$\langle{}\mathit N_{{{\mathit J / \psi}{(1S)}}}\rangle{}$

INSPIRE   JSON  (beta) PDGID:
S044JPS
VALUE DOCUMENT ID TECN  COMMENT
$0.0056$ $\pm0.0003$ $\pm0.0004$ 1
ALEXANDER
1996B
 OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $91.2$ GeV
1  ALEXANDER 1996B identify ${{\mathit J / \psi}{(1S)}}$ from the decays into lepton pairs.
References