Wuppertal 2015 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 67: Elektroschwache Physik: Di-Bosonen

T 67.9: Vortrag

Mittwoch, 11. März 2015, 18:45–19:00, L.09.28 (HS 12)

Measurement of the ZZ production cross section with ATLAS — Frank Ellinghaus, •Simon Schmitz, and Stefan Tapprogge for the ATLAS collaboration — Institut für Physik, Johannes Gutenberg-Universität Mainz

The study of the ZZ production has an excellent potential to test the electroweak sector of the Standard Model, where Z boson pairs can be produced via non-resonant processes or via Higgs decays. A deviation from the Standard Model expectation for the ZZ production cross section would be an indication for new physics. This could manifest itself in so called triple gauge couplings via ZZZ or ZZγ, which the Standard Model forbids at tree level.

The measurement of the ZZ production cross section is based on an integrated luminosity of 20.3 fb⁻¹ of proton-proton collision data at √s = 8 TeV recorded with the ATLAS detector in 2012. Measurements of differential cross sections as well as searches for triple gauge couplings have been performed. This talk presents the measurement and analysis details of the ZZ production in the ZZ→ 4l channel.