Jet reconstruction and performance using particle flow with the ATLAS Detector

ATLAS Collaboration, T. Iizawa

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    This paper describes the implementation and performance of a particle flow algorithm applied to 20.2 fb- 1 of ATLAS data from 8 TeV proton–proton collisions in Run 1 of the LHC. The algorithm removes calorimeter energy deposits due to charged hadrons from consideration during jet reconstruction, instead using measurements of their momenta from the inner tracker. This improves the accuracy of the charged-hadron measurement, while retaining the calorimeter measurements of neutral-particle energies. The paper places emphasis on how this is achieved, while minimising double-counting of charged-hadron signals between the inner tracker and calorimeter. The performance of particle flow jets, formed from the ensemble of signals from the calorimeter and the inner tracker, is compared to that of jets reconstructed from calorimeter energy deposits alone, demonstrating improvements in resolution and pile-up stability.

    Original languageEnglish
    Article number466
    JournalEuropean Physical Journal C
    Volume77
    Issue number7
    DOIs
    Publication statusPublished - 2017 Jul 1

    Fingerprint

    Calorimeters
    calorimeters
    Detectors
    detectors
    Deposits
    deposits
    Hadrons
    jet flow
    neutral particles
    piles
    retaining
    particle energy
    hadrons
    Piles
    Momentum
    counting
    momentum
    collisions
    energy

    ASJC Scopus subject areas

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

    Cite this

    Jet reconstruction and performance using particle flow with the ATLAS Detector. / ATLAS Collaboration; Iizawa, T.

    In: European Physical Journal C, Vol. 77, No. 7, 466, 01.07.2017.

    Research output: Contribution to journalArticle

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    abstract = "This paper describes the implementation and performance of a particle flow algorithm applied to 20.2 fb- 1 of ATLAS data from 8 TeV proton–proton collisions in Run 1 of the LHC. The algorithm removes calorimeter energy deposits due to charged hadrons from consideration during jet reconstruction, instead using measurements of their momenta from the inner tracker. This improves the accuracy of the charged-hadron measurement, while retaining the calorimeter measurements of neutral-particle energies. The paper places emphasis on how this is achieved, while minimising double-counting of charged-hadron signals between the inner tracker and calorimeter. The performance of particle flow jets, formed from the ensemble of signals from the calorimeter and the inner tracker, is compared to that of jets reconstructed from calorimeter energy deposits alone, demonstrating improvements in resolution and pile-up stability.",
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    AU - Abdallah, J.

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