Speaker
Description
The ATLAS experiment in the LHC Run 3 uses a two-level trigger system to select
events of interest to reduce the 40 MHz bunch crossing rate to a recorded rate
of up to 3 kHz of fully-built physics events. The trigger system is composed of
a hardware based Level-1 trigger and a software based High Level Trigger.
The selection of events by the High Level Trigger is based on a wide variety of
reconstructed objects, including leptons, photons, jets, b-jets, missing
transverse energy, and B-hadrons in order to cover the full range of the ATLAS
physics programme.
We will present an overview of improvements in the reconstruction, calibration,
and performance of the different trigger objects, as well as computational
performance of the High Level Trigger system.
