| Preprint | |
| Report number | arXiv:1801.05250 |
| Title | Measurement of the production cross-section of a single top-quark in association with a $Z$ boson at 13 TeV with the ATLAS detector |
| Related title | Measurement of the production cross-section of a single top-quark in association with a $Z$ boson at 13 TeV with the ATLAS detector |
| Author(s) | Cioară, Irina Antonela (Bonn U.) |
| Publication | 2018 |
| Collaboration | for the ATLAS Collaboration |
| Imprint | 2018-01-16 |
| Number of pages | 5 p, 5 |
| Note | * Temporary entry * 10th International Workshop on Top Quark Physics Braga, Portugal, September 17--22, 2017 |
| Presented at | 10th International Workshop on Top Quark Physics, Braga, Portugal, 17 - 22 Sep 2017 |
| Subject category | hep-ex ; Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Abstract | The production of a top quark in association with a $Z$ boson is studied in the trilepton channel. The data collected by the ATLAS experiment at the LHC in 2015 and 2016 at a centre-of-mass energy of $\sqrt{s} = 13\,\text{TeV}$ are used, corresponding to an integrated luminosity of $36.1\,\text{fb}^{-1}$. Events containing three identified leptons (electron and/or muon) and two jets, one of which is identified as a $b$-quark jet are selected. The major backgrounds come from diboson, $t\bar{t}$ and $Z+$jets production. A neural network is used to improve the background rejection and extract the signal. The resulting significance of the signal is $4.2\sigma$ in the data and the expected significance is $5.4\sigma$. The measured cross-section is $600 \pm 170\text{(stat)} \pm 140\text{(syst)}\,\text{fb}$. |
| Other source | Inspire |
| Copyright/License | CC-BY-4.0 |
Record created 2018-01-17, last modified 2023-03-15
