Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 88: Top Quarks: Production (Exp.) 3

T 88.5: Vortrag

Donnerstag, 24. März 2022, 17:15–17:30, T-H19

Measurement of the associated production of top-antitop pair with charm jets using the DL1r b-tagging algorithm in the dileptonic final state — •Moritz Habbaba, Arnulf Quadt, and Elizaveta Shabalina — II. Physikalisches Institut, Georg-August-Universität Göttingen

Top-antitop pair production production accompanied by a quark-antiquark pair is an important background for many measurements and searches. Top- antitop pair production in association with a bottom-antibottom pair has been measured with relatively good precision inclusively and differentially using powerful b-tagging tools. The b-tagging algorithms have a long and stable history within the analysis tools of particle physics. Dedicated tagging algorithms for charm quarks on the other hand have not been widely used. This work investigates the possibilities of using existing b-tagging tools for c-tagging. The expected signal purity that can be achieved by using DL1r b-tagging algorithm for the purpose of c-jet tagging is investigated. The optimal signal regions in the dilepton ttbar final state are defined and expected uncertainty on the tt+cc cross section is evaluated.