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Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 37: Top-Produktion II

T 37.2: Talk

Tuesday, March 29, 2011, 17:00–17:15, 30.22: 130

Top quark pair production cross-section measurement in the dileptonic channelMarkus Cristinziani, Sara Ghasemi, Gia Khoriauli, Agnieszka Leyko, •Tatevik Poghosyan, Ralph Schäfer, Kirika Uchida, and Kaven Yau — Physikalisches Institut, Universität Bonn

We will present a measurement of the production cross-section of top-quark pairs in the dileptonic channel in pp collisions at √s = 7 TeV using the data recorded in 2010 with the ATLAS detector at the LHC. For this study, a cut-and-count method is employed, where backgrounds from other Standard Model processes, like Zll and mis-identified leptons are estimated from data. The results will include detailed studies of the systematic uncertainties in the different sub-channels.

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