Scientific article
Open access

Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1

ContributorsATLAS Collaboration
Published inEuropean physical journal. C, Particles and fields, vol. 77, no. 7, 490
  • Open Access - SCOAP3
Publication date2017

The reconstruction of the signal from hadrons and jets emerging from the proton–proton collisions at the Large Hadron Collider (LHC) and entering the ATLAS calorimeters is based on a three-dimensional topological clustering of individual calorimeter cell signals. The cluster formation follows cell signal-significance patterns generated by electromagnetic and hadronic showers. In this, the clustering algorithm implicitly performs a topological noise suppression by removing cells with insignificant signals which are not in close proximity to cells with significant signals. The resulting topological cell clusters have shape and location information, which is exploited to apply a local energy calibration and corrections depending on the nature of the cluster. Topological cell clustering is established as a well-performing calorimeter signal definition for jet and missing transverse momentum reconstruction in ATLAS.

Citation (ISO format)
ATLAS Collaboration. Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1. In: European physical journal. C, Particles and fields, 2017, vol. 77, n° 7, p. 490. doi: 10.1140/epjc/s10052-017-5004-5
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Article (Published version)
ISSN of the journal1434-6044

Technical informations

Creation08/04/2017 5:00:06 PM
First validation08/04/2017 5:00:06 PM
Update time03/15/2023 1:54:41 AM
Status update03/15/2023 1:54:41 AM
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