Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 42: Top-Quarks: Produktion I

T 42.5: Talk

Tuesday, March 20, 2018, 17:30–17:45, Z6 - SR 2.011

Studies for the search for flavor-changing neutral currents in single-top quark production processes in association with a photon at the ATLAS experiment — •Gregor Geßner, Johannes Erdmann, and Kevin Kröninger — TU Dortmund, Lehrstuhl für Experimentelle Physik IV

Flavor-changing neutral currents (FCNC) are highly suppressed by the GIM mechanism within the Standard Model (SM). It is speculated that the top quark may play a key role in the search for deviations from the SM prediction since its mass is close to the electroweak symmetry breaking scale. In several models for physics beyond the SM, the cross section of processes including top quarks and FCNC may be larger by several orders of magnitude than expected in the SM.
Studies will be presented for the search of processes in which top quarks are produced in association with a photon via a flavor-changing neutral interaction (qg → tγ with q = u,c). The studies are performed using data recorded at the ATLAS experiment at the LHC at √s=13 TeV.