Untersuchung von ZZ Endzustaenden mit dem OPAL-Detektor

The production of ZZ -> qqll events has been studied with the OPAL <br>detector at LEP. The analysis is based on 440 pb^-1 of data <br>recorded at six different centre-of-mass energies between 183 GeV and <br>202 GeV in the years 1997 to 1999. For each possible final state <br>(l = e, mu, tau) a selection has been developed. Final <br>states with and without bbbar have also been separated. The <br>results are used to determine the ZZ production cross section. Using <br>a more general analysis, four fermion events have been selected without <br>making any special requirements concerning the invariant masses of <br>the fermion pairs. Comparisions with Standard Model predictions have been <br>performed. The ZZ production cross section is also determined after <br>combining the results of the ZZ -> qqll and ZZ -> bbll <br>selections with the results of other ZZ final states. The <br>measurements, along with the angular distribution of the observed <br>events, are used to extract limits on anomalous neutral current triple <br>gauge couplings.

Author dc:creator

• Kolrep, Martin

Contributors dc:contributor

• Herten, Gregor

• ZZ Ereignisse
• ZZ Endzustaende
• ZZ Wirkungsquerschnitt
• ZZ cross section
• ZZ final states

Repository record source_url

https://freidok.uni-freiburg.de/data/36

OAI identifier oai:identifier

oai:freidok.uni-freiburg.de:36