Date: Wednesday 18th February 2004
Title: Online Tracking for the Trigger of ATLAS
Speaker: Dr Nikos Konstantinidis (UCL)
Track reconstruction will have a central role in event selection at the second level trigger of ATLAS, but the strict time constraints and the harsh conditions at the LHC make it a very challenging task. After an overview of the ATLAS trigger strategy, I will concentrate on the tracking needs at Level-2 and will describe a set of pattern recognition algorithms designed for fast track reconstruction. These algorithms satisfy all Level-2 requirements in ATLAS and their general philosophy can be applicable to all multi-collision hadronic environments. An important use of online tracking is for b-jet identification. I will discuss the impact of online b-tagging capabilities on the ATLAS physics potential and to what extend the LEP b-tagging knowledge can be of use at the LHC.