Changes between Version 7 and Version 8 of Korea2017-08-ATL-PHYS-PROC-2016-117


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Timestamp:
Aug 14, 2017, 10:16:41 PM (8 years ago)
Author:
Eric CONTE
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  • Korea2017-08-ATL-PHYS-PROC-2016-117

    v7 v8  
    88== 1. Analysis summary ==
    99
    10 A measurement of the tt¯Z and tt¯W production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton-proton collisions at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb−1. The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in σtt¯Z=0.9±0.3 pb and σtt¯W=1.5±0.8 pb, in agreement with the Standard Model predictions.
     10A measurement of the tt¯Z and tt¯W production cross sections in final states with:
     11*   two same-charge muons: one muon coming from Z/W and one from the top decay.
     12*   or three leptons (electrons or muons),
     13*   or four leptons (electrons or muons): only ttZ case where Z and the 2 top quarks are decaying leptonically.
     14The analysis uses a data sample of proton-proton collisions at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb−1. The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in σtt¯Z=0.9±0.3 pb and σtt¯W=1.5±0.8 pb, in agreement with the Standard Model predictions.
    1115
    1216== 2. Analysis global information ==
    1317
    14 *  ATLAS contact person:
    15 *  Center of mass energy:
    16 *  Integrated luminosity:
     18*  ATLAS contact person: nobody
     19*  Center of mass energy: 13 TeV
     20*  Integrated luminosity: 3.2 fb−1
    1721*  Link to arXiv: https://arxiv.org/abs/1609.01599
    1822*  Link to the collaboration page: https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-22/
    … …  
    2428
    2529=== 3.1 Trigger selection ===
     30
     31Only events using single-electron OR single-muon triggers are accepted:
     32- single-electron: one electron with pT > 24 GeV
     33- single-muon: one muon with pT > 20 GeV
    2634
    2735PS: This part cannot usually be described by the fast-simulation of detector.