Freiburg 2008 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 39: Bottom und Charm Produktion und Zerfall III
T 39.8: Vortrag
Mittwoch, 5. März 2008, 18:30–18:45, Peterhof-HS 2
Performance studies of heavy flavour tagging with the ATLAS detector — Andrea Bangert, Siegfried Bethke, Nabil Ghodbane, Tobias Göttfert, Roland Härtel, Stefan Kluth, Anna Macchiolo, Richard Nisius, and •Sophio Pataraia — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805, München, Deutschland
Identification of jets which originate from a b quark is important for most of the Atlas experiment physics program i.e. for precise measurement of the top quark sector and searches for physics beyond the Standard Model.
We studied the performance in terms of tagging efficiencies and light quark rejection of the existing b tagging algorithms in ATLAS, using Monte Carlo simulated events. We investigated the b tagging performance for different jet reconstruction algorithms varying the parameters to reconstruct the jets for the same data samples. We performed dedicated calibration of the heavy flavour tagging procedure for tt events with at least one W decaying into leptons and using the kT jet algorithm.