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Performance of the reconstruction of large impact parameter tracks in the inner detector of ATLAS.

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Title: Performance of the reconstruction of large impact parameter tracks in the inner detector of ATLAS.
Authors: Aad, G.1 (AUTHOR), Abbott, B.2 (AUTHOR), Abeling, K.3 (AUTHOR), Abicht, N. J.4 (AUTHOR), Abidi, S. H.5 (AUTHOR), Aboulhorma, A.6 (AUTHOR), Abramowicz, H.7 (AUTHOR), Abreu, H.8 (AUTHOR), Abulaiti, Y.9 (AUTHOR), Hoffman, A. C. Abusleme10 (AUTHOR), Acharya, B. S.11,12,13 (AUTHOR), Bourdarios, C. Adam14 (AUTHOR), Adamczyk, L.15 (AUTHOR), Adamek, L.16 (AUTHOR), Addepalli, S. V.17 (AUTHOR), Addison, M. J.18 (AUTHOR), Adelman, J.19 (AUTHOR), Adiguzel, A.20 (AUTHOR), Adye, T.21 (AUTHOR), Affolder, A. A.22 (AUTHOR)
Source: European Physical Journal C -- Particles & Fields. Nov2023, Vol. 83 Issue 11, p1-32. 32p.
Subjects: Large Hadron Collider, Workflow software, Detectors, Standard model (Nuclear physics), Phase space
Abstract: Searches for long-lived particles (LLPs) are among the most promising avenues for discovering physics beyond the Standard Model at the Large Hadron Collider (LHC). However, displaced signatures are notoriously difficult to identify due to their ability to evade standard object reconstruction strategies. In particular, the ATLAS track reconstruction applies strict pointing requirements which limit sensitivity to charged particles originating far from the primary interaction point. To recover efficiency for LLPs decaying within the tracking detector volume, the ATLAS Collaboration employs a dedicated large-radius tracking (LRT) pass with loosened pointing requirements. During Run 2 of the LHC, the LRT implementation produced many incorrectly reconstructed tracks and was therefore only deployed in small subsets of events. In preparation for LHC Run 3, ATLAS has significantly improved both standard and large-radius track reconstruction performance, allowing for LRT to run in all events. This development greatly expands the potential phase-space of LLP searches and streamlines LLP analysis workflows. This paper will highlight the above achievement and report on the readiness of the ATLAS detector for track-based LLP searches in Run 3. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Performance of the reconstruction of large impact parameter tracks in the inner detector of ATLAS.
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. Nov2023, Vol. 83 Issue 11, p1-32. 32p.
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  Data: Searches for long-lived particles (LLPs) are among the most promising avenues for discovering physics beyond the Standard Model at the Large Hadron Collider (LHC). However, displaced signatures are notoriously difficult to identify due to their ability to evade standard object reconstruction strategies. In particular, the ATLAS track reconstruction applies strict pointing requirements which limit sensitivity to charged particles originating far from the primary interaction point. To recover efficiency for LLPs decaying within the tracking detector volume, the ATLAS Collaboration employs a dedicated large-radius tracking (LRT) pass with loosened pointing requirements. During Run 2 of the LHC, the LRT implementation produced many incorrectly reconstructed tracks and was therefore only deployed in small subsets of events. In preparation for LHC Run 3, ATLAS has significantly improved both standard and large-radius track reconstruction performance, allowing for LRT to run in all events. This development greatly expands the potential phase-space of LLP searches and streamlines LLP analysis workflows. This paper will highlight the above achievement and report on the readiness of the ATLAS detector for track-based LLP searches in Run 3. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=174279191
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