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arXiv · hep-ex/9909043

Study of Z Boson Pair Production in e+e- Collisions at LEP at \sqrt{s}=189 GeV

L3 Collaboration
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Abstract

The pair production of Z bosons is studied using the data collected by the L3 detector at LEP in 1998 in e+e- collisions at a centre-of-mass energy of 189 GeV. All the visible final states are considered and the cross section of this process is measured to be 0.74 +0.15 -0.14 (stat.) +/- 0.04 (syst.) pb. Final states containing b quarks are enhanced by a dedicated selection and their production cross section is found to be 0.18 +0.09 -0.07 (stat.) +/- 0.02 (syst.) pb. Both results are in agreement with the Standard Model predictions. Limits on anomalous couplings between neutral gauge bosons are derived from these measurements.

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L3 Collaboration. 1999-09-25. Study of Z Boson Pair Production in e+e- Collisions at LEP at \sqrt{s}=189 GeV. https://doi.org/10.1016/s0370-2693(99)01065-5

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