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

Aad, G. ; Åkesson, T.P.A. LU orcid ; Astrand, S. LU ; Doglioni, C. LU ; Ekman, P.A. LU orcid ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid and Poettgen, R. LU orcid , et al. (2025) In Journal of Instrumentation 20(2).
Abstract
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... (More)
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. © 2025 CERN for the benefit of the ATLAS collaboration. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
calibration, cluster finding, fitting methods, Gaseous imaging and tracking detectors, Particle tracking detectors (Solid-state detectors), Pattern recognition, Vertexing algorithms, Electrons, Hadrons, Linear accelerators, Negative ions, Photons, Positive ions, Silicon detectors, Solid-state sensors, Cluster finding, Fitting method, Gaseous imaging detectors, Particle tracking, Particle tracking detector (solid-state detector), Solid state detectors, Tracking detectors, Tracking performance, Vertexing algorithm, Particle detectors
in
Journal of Instrumentation
volume
20
issue
2
article number
P02018
publisher
IOP Publishing
external identifiers
  • scopus:105001207995
ISSN
1748-0221
DOI
10.1088/1748-0221/20/02/P02018
language
English
LU publication?
yes
id
8700cae6-d514-4603-a678-1050106ac4ad
date added to LUP
2026-03-06 09:29:15
date last changed
2026-03-06 09:29:50
@article{8700cae6-d514-4603-a678-1050106ac4ad,
  abstract     = {{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. © 2025 CERN for the benefit of the ATLAS collaboration.}},
  author       = {{Aad, G. and Åkesson, T.P.A. and Astrand, S. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Smirnova, O. and Wallin, E. J. and Zwalinski, L.}},
  issn         = {{1748-0221}},
  keywords     = {{calibration; cluster finding; fitting methods; Gaseous imaging and tracking detectors; Particle tracking detectors (Solid-state detectors); Pattern recognition; Vertexing algorithms; Electrons; Hadrons; Linear accelerators; Negative ions; Photons; Positive ions; Silicon detectors; Solid-state sensors; Cluster finding; Fitting method; Gaseous imaging detectors; Particle tracking; Particle tracking detector (solid-state detector); Solid state detectors; Tracking detectors; Tracking performance; Vertexing algorithm; Particle detectors}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{IOP Publishing}},
  series       = {{Journal of Instrumentation}},
  title        = {{Expected tracking performance of the ATLAS Inner Tracker at the High-Luminosity LHC}},
  url          = {{http://dx.doi.org/10.1088/1748-0221/20/02/P02018}},
  doi          = {{10.1088/1748-0221/20/02/P02018}},
  volume       = {{20}},
  year         = {{2025}},
}