DPF99 - Study of the production of Z boson pairs in $e^+e^-$ collisions at LEP with the L3 detector

The Electronic Publishing Project of the UCLA Library

Author: S. Hou for the L3 collaboration

Title: Study of the production of Z boson pairs in $e^+e^-$ collisions at LEP with the L3 detector

Abstract: At the center-of-mass energy of 183 GeV attained by the LEP $\ee$collider in 1997, the threshold production of a Z pair has becomeaccessible. This phenomenon is enhanced for the higher cross section and integrated luminosity ofthe 1998 run at 189 GeV. We report on the study of all the visible decay modes of this pair. Combining all these final states the presence of a non vanishing signal is established at more than 95\% of confidence level at 183 GeV and itscross section is measured to be in agreement with the Standard Modelpredictions. No evidence for the existence of anomalous triple gauge boson ZZZ and ZZ$\gamma$ couplings is found and limits on their value are set. Preliminary results at 189 GeV are also discussed.

Comments: address:National Central University, Taiwan

Download the full paper in the following formats:

Proceedings of this conference are published on the World Wide Web by the Library of the University of California at Los Angeles. Although the proceedings are published solely on the Web, identical editorial standards have been applied as for book versions of proceedings.

DPF99