Software and computing for Run 3 of the ATLAS experiment at the LHC

Abstract

The ATLAS experiment has developed extensive software and distributed computing systems for Run 3 of the LHC. These systems are described in detail, including software infrastructure and workflows, distributed data and workload management, database infrastructure, and validation. The use of these systems to prepare the data for physics analysis and assess its quality are described, along with the software tools used for data analysis itself. An outlook for the development of these projects towards Run 4 is also provided.

177 pages in total, author list starting page 160, 42 figures, 5 tables, published on EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SOFT-2022-02. Version V3 differs from version V2 only in the author list

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• Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in $\sqrt{s}$=13 TeV proton-proton collisions with the ATLAS detector
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• Energy scale and resolution for anti-$k_t$ jets with radius parameters $R=0.2$ and 0.6 measured in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
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• Study of Particle Fluence Effects on Collected Charge and Depletion Voltage of the ATLAS IBL Planar Pixel Sensors
• Measurement of high-mass $t\bar{t}{\ell }^{+}{\ell }^{-}$ production and lepton flavour universality-inspired effective field theory interpretations at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for long-lived particles using displaced vertices of oppositely charged leptons in 140 fb${}^{-1}$ of pp collisions at $\sqrt{s}=13$ TeV with the ATLAS detector