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T: Fachverband Teilchenphysik
T 11: Top Quark Tagging
T 11.4: Talk
Monday, February 29, 2016, 11:45–12:00, VMP8 SR 05
Top-tagging in ATLAS for Run-1 and Run-2 — •Julien Caudron, Sabrina Groh, Tobias Heck, and Lucia Masetti — Johannes Gutenberg-Universität Mainz
Studies of the boosted sector in top-quark physics have known a fast-growing development with the arrival of high-energy data at LHC. Different techniques to identify high-pT top quarks based on substructure analyses of large radius jets have been developed for Run-1 and Run-2 data. For Run 1, the ATLAS collaboration have studied the optimization and performance of different techniques (HEPTopTagger, Shower Deconstruction and substructure variables cut-based taggers), using pp collision data and MC simulations at √s=8 TeV. For Run 2, a simple algorithm has been developed, intended to provide strong and reliable performance for early √s=13 TeV analyses. Two working points have been provided, for high efficiency or high rejection. Uncertainties, as well as the performance in different topologies, have also been studied.