Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector

The ATLAS collaboration

    Research output: Contribution to journalArticle

    Abstract

    The large rate of multiple simultaneous proton–proton interactions, or pile-up, generated by the Large Hadron Collider in Run 1 required the development of many new techniques to mitigate the adverse effects of these conditions. This paper describes the methods employed in the ATLAS experiment to correct for the impact of pile-up on jet energy and jet shapes, and for the presence of spurious additional jets, with a primary focus on the large 20.3 fb- 1data sample collected at a centre-of-mass energy of s=8TeV. The energy correction techniques that incorporate sophisticated estimates of the average pile-up energy density and tracking information are presented. Jet-to-vertex association techniques are discussed and projections of performance for the future are considered. Lastly, the extension of these techniques to mitigate the effect of pile-up on jet shapes using subtraction and grooming procedures is presented.

    Original languageEnglish (US)
    Article number581
    JournalEuropean Physical Journal C
    Volume76
    Issue number11
    DOIs
    StatePublished - Nov 1 2016

    Fingerprint

    piles
    Piles
    Detectors
    collisions
    detectors
    Colliding beam accelerators
    subtraction
    center of mass
    energy
    apexes
    flux density
    projection
    estimates
    Experiments
    interactions

    ASJC Scopus subject areas

    • Engineering (miscellaneous)
    • Physics and Astronomy (miscellaneous)

    Cite this

    Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector. / The ATLAS collaboration.

    In: European Physical Journal C, Vol. 76, No. 11, 581, 01.11.2016.

    Research output: Contribution to journalArticle

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    abstract = "The large rate of multiple simultaneous proton–proton interactions, or pile-up, generated by the Large Hadron Collider in Run 1 required the development of many new techniques to mitigate the adverse effects of these conditions. This paper describes the methods employed in the ATLAS experiment to correct for the impact of pile-up on jet energy and jet shapes, and for the presence of spurious additional jets, with a primary focus on the large 20.3 fb- 1data sample collected at a centre-of-mass energy of s=8TeV. The energy correction techniques that incorporate sophisticated estimates of the average pile-up energy density and tracking information are presented. Jet-to-vertex association techniques are discussed and projections of performance for the future are considered. Lastly, the extension of these techniques to mitigate the effect of pile-up on jet shapes using subtraction and grooming procedures is presented.",
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    AU - Abdinov, O.

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