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

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.

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CU Research Publications Repository
Published
2025-01-01
Primary Topic
Geological and Geochemical Analysis
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article
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article

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

CU Research Publications Repository
Geological and Geochemical Analysis
article

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

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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.

CU Research Publications Repository
National Science Foundation, U.S. Department of Energy, Univerzita Komenského v Bratislave, Ankara Universitesi, Brandeis University, Canarie, University of Bern, Iowa State University, University of Texas at Arlington, Slovenská Akadémia Vied, TRIUMF, CERN, UK Research and Innovation, Université Mohammed VI Polytechnique, Université Savoie Mont Blanc, Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei', Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu, University of Alberta, European Commission, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Danmarks Grundforskningsfond, Fundação de Amparo à Pesquisa do Estado de São Paulo, National Natural Science Foundation of China, Ministerstvo Školství, Mládeže a Tělovýchovy, Bundesministerium für Bildung und Forschung, Chinese Academy of Sciences, Austrian Science Fund, Universidad Nacional de Colombia, Consejo Nacional de Investigaciones Científicas y Técnicas, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Bundesministerium für Wissenschaft, Forschung und Wirtschaft, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Tsinghua University, Max-Planck-Gesellschaft, Universitatea Transilvania din Brasov, Ministerstwo Edukacji i Nauki, Centre National de la Recherche Scientifique, Universitetet i Bergen, National and Kapodistrian University of Athens, Universidad de Buenos Aires, Università di Bologna, Centre National pour la Recherche Scientifique et Technique, University of Johannesburg, Forskningsrådet om Hälsa, Arbetsliv och Välfärd, University of Cape Town, Universitatea din București, University of the Philippines, Rheinische Friedrich-Wilhelms-Universität Bonn, University of South Africa, Gaziantep Üniversitesi, National University of Science and Technology, Université Cadi Ayyad, University of Zululand, Université Hassan II de Casablanca, National Technical University of Athens, Agencia Nacional de Investigación y Desarrollo, National Science and Technology Council, Institut de Física d'Altes Energies, Natural Sciences and Engineering Research Council of Canada, Science and Technology Facilities Council, Japan Society for the Promotion of Science, Fundação para a Ciência e a Tecnologia, Agencia Nacional de Promoción Científica y Tecnológica, British Columbia Knowledge Development Fund, European Regional Development Fund, Agencia Estatal de Investigación, Institute of High Energy Physics, Institut National de Physique Nucléaire et de Physique des Particules, Division of Physics, High Energy Physics, Argonne National Laboratory, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory, H2020 Marie Skłodowska-Curie Actions
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