High mass photon pairs in lepton+ lepton- gamma gamma events at LEP
Collaboration
10 pages
Published in:
- Phys.Lett.B 295 (1992) 337-346
- Published: 1992
Report number:
- CERN-PPE-92-152
Experiments:
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Abstract: (Elsevier)
From the analysis of the reactions e + e − → l + l − ( nγ ) ( l = e , μ , τ ) we observe four events, one e + e − γγ and three μ + μ − γγ , with the invariant mass of the photon pairs close to 60 GeV. These events were selected from a data sample collected in the L3 detector corresponding to 950 000 produced Z 0 's. More data are necessary to ascertain the origin of these events.- electron positron: colliding beams
- colliding beams: electron positron
- electron positron: annihilation
- annihilation: electron positron
- Z0: electroproduction
- electroproduction: Z0
- lepton: pair production
- pair production: lepton
- photon: associated production
- associated production: photon
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