Speaker
Dominik Duda
(Fachbereich C / Physik)
Description
Many physics analyses with the ATLAS detector expect to have jet originating from b-quarks in the final state. Algorithms that allow to identify such jets are thus of great importance and it is crucial to understand their performance with data-driven measurements of efficiencies and fake rates. Since the top quark almost exclusively decays to a W boson and a b-quark, a sample of top anti-top events is ideal for studying the b-tagging performance. Final states containing one or two leptons have been used to measure the b-tagging efficiency, either by counting the number of b-tagged jets or by applying kinematical fit methods to extract a pure sample of b-jets. The calibration methods based on top anti-top events are especially important because they can provide measurements of the b-tagging efficiency also for jets with high momentum.
<strong>Collaboration Name</strong><br /><font color="#000099">Please enter the name of<br />the collaboration or group<br />using the acronym, as in:<br /><font color="#ff0000">ABC Collaboration</font>
ATLAS Collaboration
| <strong>E-mail Address</strong> | dominik.duda@cern.ch |
|---|
Primary author
Dominik Duda
(Fachbereich C / Physik)
