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Performance and Strategies of the b-Jet Selection for the ATLAS High-Level Trigger

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5 Author(s)
Coccaro, A. ; Dipt. di Fis., Univ. di Genova, Genoa, Italy ; Lowe, A. ; Parodi, F. ; Schiavi, C.
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The ATLAS detector will operate in a highly challenging environment that requires a sophisticated trigger strategy. The online b-jet selection is an important part of the trigger which greatly improves its flexibility and extends the ATLAS physics programme. More specifically, b -jet acceptance is increased and background reduced by lowering jet transverse energy thresholds at the first trigger level and then applying b-tagging at subsequent levels. Several physics channels, especially those with topologies containing more than one b -jet, benefit from requesting this kind of trigger firing. We present an overview of the b -jet trigger algorithms and menu at the experiment start-up.

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Nuclear Science, IEEE Transactions on  (Volume:56 ,  Issue: 4 )