# Journal article

## Observation of multiple hard photon final states at root s=130-140 GeV at LEP

Abstract:

We have studied the process e+e- → ny (n ≥ 2) at an average center-of-mass energy of 133 GeV using the L3 detector at LEP. For an integrated luminosity of 4.95 pb-1 we find one γγγγ(γ) final state with only hard photons. The rates of both γγγ and γγ events are consistent with QED expectations. The cross section of the reaction e+e- → γγ(γ) in the polar range 16° < θγ < 164° is measured to be 22.6 ± 2.2 pb. Decays into photons of narrow scalar resonances with masses between 90 and 130 Ge...

Publication status:
Published

### Authors

Journal:
Physics Letters B
Volume:
384
Issue:
1-4
Pages:
323-332
Publication date:
1996-09-19
DOI:
ISSN:
0370-2693
Pubs id:
pubs:11928
UUID:
uuid:405cc6a6-2cc9-4398-aeb1-18fdabcfce8d
Local pid:
pubs:11928
Source identifiers:
11928
Deposit date:
2012-12-19