Journal article
Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
Abstract
A first measurement of the cross section of the process e+e−→Zγγ is reported using a total integrated luminosity of 231pb−1 collected with the L3 detector at centre-of-mass energies of 182.7GeV and 188.7GeV. By selecting hadronic events with two isolated photons the e+e−→Zγγ cross section is measured to be 0.49+0.20−0.17±0.04pb at 182.7GeV and 0.47±0.10±0.04pb at 188.7GeV. The measurements are consistent with Standard Model expectations. Limits …
Authors
Collaboration L; Acciarri M; Achard P; Adriani O; Aguilar-Benitez M; Alcaraz J; Alemanni G; Allaby J; Aloisio A; Alviggi MG
Journal
Physics Letters B, Vol. 478, No. 1-3, pp. 39–49
Publisher
Elsevier
Publication Date
April 2000
DOI
10.1016/s0370-2693(00)00279-3
ISSN
0370-2693