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Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 38: Top-Produktion III

T 38.4: Talk

Wednesday, March 30, 2011, 17:30–17:45, 30.22: 130

Single top production in the Wt channel at ATLASIan C. Brock, Thomas Loddenkötter, and •Jan A. Stillings — Physikalisches Institut, Universität Bonn

Single top quark production is the second largest source of top quarks from proton-proton collisions at the LHC. It has a lower cross-section than the tt production process and is also harder to separate from the background. There are several channels which produce single top quarks in the final state. Of these, the Wt channel is expected to have the second largest contribution at the LHC. Its decay topology consists of a hard b-jet originating from the top quark decay as well as two W bosons. The studies presented focus on the lepton+jets channel where one W boson decays hadronically and the other one decays leptonically. Methods will be discussed how to separate this specific channel both from its backgrounds and the tt production process.

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