The performance of the jet trigger for the ATLAS detector during 2011 data taking

Understand

The performance of the jet trigger for the ATLAS detector at the LHC during the 2011 data taking period is described.

• During 2011 the LHC provided proton-proton collisions with a centre-of-mass energy of 7 TeV and heavy ion collisions with a 2.76 TeV per nucleon-nucleon collision energy.
• The ATLAS trigger is a three level system designed to reduce the rate of events from the 40 MHz nominal maximum bunch crossing rate to the approximate 400 Hz which can be written to offline storage.
• The ATLAS jet trigger is the primary means for the online selection of events containing jets.