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T: Fachverband Teilchenphysik

T 101: Top Quark 5 (Eigenschaften)

T 101.9: Vortrag

Donnerstag, 30. März 2017, 18:45–19:00, JUR 4

Estimation of the "hadron-fake" background for t t γ production in pp collision with the ATLAS experiment — •Sara Ghasemi, Ivor Fleck, and Yichen Li — Universität Siegen, Department für Physik, D-57068 Siegen, Germany

The pair production of Top quarks with an associated photon is of particular interest, as it provides the opportunity to study the electroweak couplings of the Top quark.

In the t t γ analysis, a template fit is used to estimated the fraction of signal events in the observed data. The major background contribution comes from the hadrons misidentified as photons; the so-called “hadron-fakes”. Templates are extracted for the prompt photons and the hadron-fakes, separately. In this presentation, the hadron-fake template determination from control samples in data is presented.