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Woodlands Conference Center
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The design and performance of the ATLAS Inner Detector trigger in high pileup collisions at 13 TeV at the Large Hadron Collider

Jun 12, 2018, 2:40 PM
1h 30m
Woodlands Conference Center

Woodlands Conference Center

159 Visitor Center Dr, Williamsburg, VA 23185
Poster presentation Trigger Systems Poster 1


Pierre-Hugues Beauchemin (Tufts University (US))


The design and performance of the ATLAS Inner Detector (ID) trigger
algorithms running online on the High Level Trigger (HLT) processor
farm for 13 TeV LHC collision data with high pileup are discussed. The
HLT ID tracking is a vital component in all physics signatures in the
ATLAS Trigger for the precise selection of the rare or interesting
events necessary for physics analysis without overwhelming the offline
data storage in terms of both size and rate. To cope with the high
interaction rates expected in the 13 TeV LHC collisions the ID trigger
was redesigned during the 2013-15 long shutdown. The performance of
the ID Trigger in both the 2016 and 2017 data from 13 TeV LHC
collisions has been excellent and exceeded expectations, even at the
very high interaction multiplicities observed at the end of data
taking in 2017. The detailed efficiencies and resolutions of the
trigger in a wide range of physics signatures are presented for the
Run 2 data, illustrating the superb performance of the ID trigger
algorithms in these extreme pileup conditions. This demonstrates how the
ID tracking continues to lie at the heart of the trigger performance
which enables the ATLAS physics program, and will continue to do so in the

Minioral Yes
Country Switzerland
Speaker ATLAS
Description trigger
Institute CERN

Primary author

Pierre-Hugues Beauchemin (Tufts University (US))

Presentation materials