Production of $\eta$ Mesons in $e^+ e^-$ Annihilations at $\sqrt{s}=29$-{GeV}

Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J.-M.; Bylsma, B.G.; Chapman, J.; Cork, B.; DeBonte, R.

doi:10.1016/0370-2693(88)90408-X

Production of $\eta$ Mesons in $e^+ e^-$ Annihilations at $\sqrt{s}=29$ -{GeV}

HRS

Collaboration

•

S. Abachi
(
- Argonne (main) and
- Indiana U. and
- Michigan U. and
- Purdue U. and
- LBL, Berkeley
)

Oct, 1987

4 pages

Published in:

Phys.Lett.B 205 (1988) 111-114

Published: 1988

DOI:

10.1016/0370-2693(88)90408-X

Report number:

ANL-HEP-PR-87-106,
IUHEE-87-12,
UM-HE-87-27,
PU-87-608

Experiments:

SLAC-PEP-012

View in:

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Abstract: (Elsevier)

Data from e + e − annihilations at 29 GeV have been used to measure the production cross section and fragmentation function of η mesons. The signal is observed in the η → γγ decay channel. The fragmentation for p η >1.5 GeV/ c agrees well with the prediction of the Lund model, whereas the prediction of the Webber model lies above the data. The mean multiplicity is measured to be 〈 n η 〉=0.58±0.10 η mesons per hadronic event, of which 0.51 represents the direct production of η and η ′ mesons in the fragmentation chain.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
ELECTRON POSITRON: INCLUSIVE REACTION
ETA: ELECTROPRODUCTION
ELECTROPRODUCTION: ETA
ETA: FRAGMENTATION FUNCTION
YIELD: (ETA)
ETA: RADIATIVE DECAY