Speaker
Teresa Maria Fonseca Martin
(CERN)
Description
The ATLAS experiment under construction at CERN is due to begin operation at the end
of 2007. The detector will record the results of proton-proton collisions at a
centre-of-mass energy of 14 TeV. The trigger is a three-tier system designed to
identify in real-time potentially interesting events that are then saved for detailed
offline analysis. The trigger system will select approximately 200 Hz of potentially
interesting events out of the 40 MHz bunch-crossing rate (with ~10^9 interactions per
second at the nominal luminosity).
Algorithms used in the trigger system to identify different event
features of interest will be described, as well as their expected performance in
terms of selection efficiency, background rejection and computation time per event.
The talk will concentrate on recent improvements and on performance studies, using a
very detailed simulation of the ATLAS detector and electronics chain that emulates
the raw data as it will appear at the input to the trigger system. Checks on the
robustness of the algorithms to detector misalignment and miscalibration will also be
discussed.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | ATLAS Trigger Algorithms, Performance and Menus group |
|---|
Author
Teresa Maria Fonseca Martin
(CERN)
