Expected tracking performance of the ATLAS Inner Tracker at the High-Luminosity LHC

Journal article

The high-luminosity phase of LHC operations (HL-LHC), will feature a large increase in simultaneous proton-proton interactions per bunch crossing up to 200, compared with a typical leveling target of 64 in Run 3. Such an increase will create a very challenging environment in which to perform charged particle trajectory reconstruction, a task crucial for the success of the ATLAS physics program, and will exceed the capabilities of the current ATLAS Inner Detector (ID). A new all-silicon Inner Tracker (ITk) will replace the current ID in time for the start of the HL-LHC. To ensure successful use of the ITk capabilities in Run 4 and beyond, the ATLAS tracking software has been successfully adapted to achieve state-of-the-art track reconstruction in challenging high-luminosity conditions with the ITk detector. This paper presents the expected tracking performance of the ATLAS ITk based on the latest available developments since the ITk technical design reports.

Authors: Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Journal of Instrumentation
• Volume: 20
• Issue: 02
• Article number: P02018
• Publication date: 2025-02-18
• Acceptance date: 2025-01-20
• DOI: 10.1088/1748-0221/20/02/p02018
• EISSN: 1748-0221
• Language: English
• Keywords: Particle tracking detectors (Solid-state detectors); Vertexing algorithms; Pattern recognition, cluster finding, calibration and fitting methods; Gaseous imaging and tracking detectors