| ATLAS Slides | |
| Report number | ATL-PHYS-SLIDE-2016-354 |
| Title | Measurement of the ttZ cross section in the four lepton channel at 13 TeV with ATLAS |
| Author(s) | Schulte, Alexandra (Institut fuer Physik, Universitaet Mainz) |
| Corporate author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Submitted to | 4th Conference on Large Hadron Collider Physics 2016 (LHCP 2016), Lund, Sweden, 13 - 18 Jun 2016 |
| Submitted by | alexandra.schulte@cern.ch on 21 Jun 2016 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | Top properties ; ttZ ; cross section ; TOP |
| Abstract | The production of a Z boson together with a top quark pair provides an important test of the standard model and can be used to measure the coupling between a top quark and a Z boson. So far the coupling has not yet directly been measured. A first probe of the coupling is the observation of the associated production of a top quark pair and a Z boson. The ttZ cross section has already been measured by ATLAS and CMS at 8 TeV. This poster shows the first results at 13 TeV in the four lepton channel. The current measurement with 3.2 fb-1 reaches about the same sensitivity as the 8 TeV one, at an increase of the ttZ cross section of about four. The four lepton channel is characterized by very pure signal regions but still limited by large statistical uncertainties. |
Record created 2016-06-21, last modified 2017-05-24