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Measurement of the e+e- -> ZZ production cross-section at centre-of-mass energies of 183 and 189GeV

ALEPH Collaboration

hep-exarXiv:hep-ex/9911003

Abstract

The ee -> ZZ cross section at sqrt(s)=182.7 and 188.6 GeV has been measured using the ALEPH detector. The analysis covers all of the visible ZZ final states and yields cross section measurements of sigmaZZ(182.7 GeV) = 0.11 +- (0.16,0.11) (stat.) +- 0.04 (syst.) pb and sigmaZZ(188.6 GeV) = 0.67 +- 0.13 (stat.) +- 0.04 (syst.) pb consistent with the Standard Model expectations.

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