Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run

G. Aad, T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, O. Abdinov, R. Aben, B. Abi, M. Abolins, O. S. AbouZeid, H. Abramowicz, H. Abreu, B. S. Acharya, L. Adamczyk, D. L. Adams, T. N. Addy, J. Adelman, S. Adomeit, P. Adragna & 31 others T. Adye, S. Aefsky, J. A. Aguilar-Saavedra, M. Agustoni, M. Aharrouche, S. P. Ahlen, F. Ahles, A. Ahmad, M. Ahsan, G. Aielli, T. Akdogan, T. P A Åkesson, G. Akimoto, A. V. Akimov, M. S. Alam, M. A. Alam, J. Albert, S. Albrand, M. Aleksa, I. N. Aleksandrov, F. Alessandria, C. Alexa, G. Alexander, G. Alexandre, T. Alexopoulos, B. Budick, K. Cranmer, A. Haas, A. I. Mincer, P. Nemethy, The ATLAS collaboration

    Research output: Contribution to journalArticle

    Abstract

    This paper presents a summary of beam-induced backgrounds observed in the ATLAS detector and discusses methods to tag and remove background contaminated events in data. Triggerrate based monitoring of beam-related backgrounds is presented. The correlations of backgrounds with machine conditions, such as residual pressure in the beam-pipe, are discussed. Results from dedicated beam-background simulations are shown, and their qualitative agreement with data is evaluated. Data taken during the passage of unpaired, i.e. non-colliding, proton bunches is used to obtain background-enriched data samples. These are used to identify characteristic features of beam-induced backgrounds, which then are exploited to develop dedicated background tagging tools. These tools, based on observables in the Pixel detector, the muon spectrometer and the calorimeters, are described in detail and their efficiencies are evaluated. Finally an example of an application of these techniques to a monojet analysis is given, which demonstrates the importance of such event cleaning techniques for some new physics searches.

    Original languageEnglish (US)
    Article numberP07004
    JournalJournal of Instrumentation
    Volume8
    Issue number7
    DOIs
    StatePublished - 2013

    Fingerprint

    Protons
    Detector
    Detectors
    protons
    detectors
    Calorimeters
    Spectrometers
    Cleaning
    Physics
    Pixels
    Pipe
    Monitoring
    cleaning
    marking
    calorimeters
    muons
    Calorimeter
    pixels
    Background
    spectrometers

    Keywords

    • Accelerator modelling and simulations (multi-particle dynamics
    • Analysis and statistical methods
    • Pattern recognition, cluster finding, calibration and fitting methods
    • Performance of High Energy Physics Detectors
    • single-particle dynamics)

    ASJC Scopus subject areas

    • Instrumentation
    • Mathematical Physics

    Cite this

    Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdelalim, A. A., ... The ATLAS collaboration (2013). Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run. Journal of Instrumentation, 8(7), [P07004]. https://doi.org/10.1088/1748-0221/8/07/P07004

    Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run. / Aad, G.; Abajyan, T.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; Abdelalim, A. A.; Abdinov, O.; Aben, R.; Abi, B.; Abolins, M.; AbouZeid, O. S.; Abramowicz, H.; Abreu, H.; Acharya, B. S.; Adamczyk, L.; Adams, D. L.; Addy, T. N.; Adelman, J.; Adomeit, S.; Adragna, P.; Adye, T.; Aefsky, S.; Aguilar-Saavedra, J. A.; Agustoni, M.; Aharrouche, M.; Ahlen, S. P.; Ahles, F.; Ahmad, A.; Ahsan, M.; Aielli, G.; Akdogan, T.; Åkesson, T. P A; Akimoto, G.; Akimov, A. V.; Alam, M. S.; Alam, M. A.; Albert, J.; Albrand, S.; Aleksa, M.; Aleksandrov, I. N.; Alessandria, F.; Alexa, C.; Alexander, G.; Alexandre, G.; Alexopoulos, T.; Budick, B.; Cranmer, K.; Haas, A.; Mincer, A. I.; Nemethy, P.; The ATLAS collaboration.

    In: Journal of Instrumentation, Vol. 8, No. 7, P07004, 2013.

    Research output: Contribution to journalArticle

    Aad, G, Abajyan, T, Abbott, B, Abdallah, J, Abdel Khalek, S, Abdelalim, AA, Abdinov, O, Aben, R, Abi, B, Abolins, M, AbouZeid, OS, Abramowicz, H, Abreu, H, Acharya, BS, Adamczyk, L, Adams, DL, Addy, TN, Adelman, J, Adomeit, S, Adragna, P, Adye, T, Aefsky, S, Aguilar-Saavedra, JA, Agustoni, M, Aharrouche, M, Ahlen, SP, Ahles, F, Ahmad, A, Ahsan, M, Aielli, G, Akdogan, T, Åkesson, TPA, Akimoto, G, Akimov, AV, Alam, MS, Alam, MA, Albert, J, Albrand, S, Aleksa, M, Aleksandrov, IN, Alessandria, F, Alexa, C, Alexander, G, Alexandre, G, Alexopoulos, T, Budick, B, Cranmer, K, Haas, A, Mincer, AI, Nemethy, P & The ATLAS collaboration 2013, 'Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run', Journal of Instrumentation, vol. 8, no. 7, P07004. https://doi.org/10.1088/1748-0221/8/07/P07004
    Aad, G. ; Abajyan, T. ; Abbott, B. ; Abdallah, J. ; Abdel Khalek, S. ; Abdelalim, A. A. ; Abdinov, O. ; Aben, R. ; Abi, B. ; Abolins, M. ; AbouZeid, O. S. ; Abramowicz, H. ; Abreu, H. ; Acharya, B. S. ; Adamczyk, L. ; Adams, D. L. ; Addy, T. N. ; Adelman, J. ; Adomeit, S. ; Adragna, P. ; Adye, T. ; Aefsky, S. ; Aguilar-Saavedra, J. A. ; Agustoni, M. ; Aharrouche, M. ; Ahlen, S. P. ; Ahles, F. ; Ahmad, A. ; Ahsan, M. ; Aielli, G. ; Akdogan, T. ; Åkesson, T. P A ; Akimoto, G. ; Akimov, A. V. ; Alam, M. S. ; Alam, M. A. ; Albert, J. ; Albrand, S. ; Aleksa, M. ; Aleksandrov, I. N. ; Alessandria, F. ; Alexa, C. ; Alexander, G. ; Alexandre, G. ; Alexopoulos, T. ; Budick, B. ; Cranmer, K. ; Haas, A. ; Mincer, A. I. ; Nemethy, P. ; The ATLAS collaboration. / Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run. In: Journal of Instrumentation. 2013 ; Vol. 8, No. 7.
    @article{4c71c4970fef417898c14a8c7b65cca0,
    title = "Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run",
    abstract = "This paper presents a summary of beam-induced backgrounds observed in the ATLAS detector and discusses methods to tag and remove background contaminated events in data. Triggerrate based monitoring of beam-related backgrounds is presented. The correlations of backgrounds with machine conditions, such as residual pressure in the beam-pipe, are discussed. Results from dedicated beam-background simulations are shown, and their qualitative agreement with data is evaluated. Data taken during the passage of unpaired, i.e. non-colliding, proton bunches is used to obtain background-enriched data samples. These are used to identify characteristic features of beam-induced backgrounds, which then are exploited to develop dedicated background tagging tools. These tools, based on observables in the Pixel detector, the muon spectrometer and the calorimeters, are described in detail and their efficiencies are evaluated. Finally an example of an application of these techniques to a monojet analysis is given, which demonstrates the importance of such event cleaning techniques for some new physics searches.",
    keywords = "Accelerator modelling and simulations (multi-particle dynamics, Analysis and statistical methods, Pattern recognition, cluster finding, calibration and fitting methods, Performance of High Energy Physics Detectors, single-particle dynamics)",
    author = "G. Aad and T. Abajyan and B. Abbott and J. Abdallah and {Abdel Khalek}, S. and Abdelalim, {A. A.} and O. Abdinov and R. Aben and B. Abi and M. Abolins and AbouZeid, {O. S.} and H. Abramowicz and H. Abreu and Acharya, {B. S.} and L. Adamczyk and Adams, {D. L.} and Addy, {T. N.} and J. Adelman and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, {J. A.} and M. Agustoni and M. Aharrouche and Ahlen, {S. P.} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, {T. P A} and G. Akimoto and Akimov, {A. V.} and Alam, {M. S.} and Alam, {M. A.} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, {I. N.} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and B. Budick and K. Cranmer and A. Haas and Mincer, {A. I.} and P. Nemethy and {The ATLAS collaboration}",
    year = "2013",
    doi = "10.1088/1748-0221/8/07/P07004",
    language = "English (US)",
    volume = "8",
    journal = "Journal of Instrumentation",
    issn = "1748-0221",
    publisher = "IOP Publishing Ltd.",
    number = "7",

    }

    TY - JOUR

    T1 - Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run

    AU - Aad, G.

    AU - Abajyan, T.

    AU - Abbott, B.

    AU - Abdallah, J.

    AU - Abdel Khalek, S.

    AU - Abdelalim, A. A.

    AU - Abdinov, O.

    AU - Aben, R.

    AU - Abi, B.

    AU - Abolins, M.

    AU - AbouZeid, O. S.

    AU - Abramowicz, H.

    AU - Abreu, H.

    AU - Acharya, B. S.

    AU - Adamczyk, L.

    AU - Adams, D. L.

    AU - Addy, T. N.

    AU - Adelman, J.

    AU - Adomeit, S.

    AU - Adragna, P.

    AU - Adye, T.

    AU - Aefsky, S.

    AU - Aguilar-Saavedra, J. A.

    AU - Agustoni, M.

    AU - Aharrouche, M.

    AU - Ahlen, S. P.

    AU - Ahles, F.

    AU - Ahmad, A.

    AU - Ahsan, M.

    AU - Aielli, G.

    AU - Akdogan, T.

    AU - Åkesson, T. P A

    AU - Akimoto, G.

    AU - Akimov, A. V.

    AU - Alam, M. S.

    AU - Alam, M. A.

    AU - Albert, J.

    AU - Albrand, S.

    AU - Aleksa, M.

    AU - Aleksandrov, I. N.

    AU - Alessandria, F.

    AU - Alexa, C.

    AU - Alexander, G.

    AU - Alexandre, G.

    AU - Alexopoulos, T.

    AU - Budick, B.

    AU - Cranmer, K.

    AU - Haas, A.

    AU - Mincer, A. I.

    AU - Nemethy, P.

    AU - The ATLAS collaboration

    PY - 2013

    Y1 - 2013

    N2 - This paper presents a summary of beam-induced backgrounds observed in the ATLAS detector and discusses methods to tag and remove background contaminated events in data. Triggerrate based monitoring of beam-related backgrounds is presented. The correlations of backgrounds with machine conditions, such as residual pressure in the beam-pipe, are discussed. Results from dedicated beam-background simulations are shown, and their qualitative agreement with data is evaluated. Data taken during the passage of unpaired, i.e. non-colliding, proton bunches is used to obtain background-enriched data samples. These are used to identify characteristic features of beam-induced backgrounds, which then are exploited to develop dedicated background tagging tools. These tools, based on observables in the Pixel detector, the muon spectrometer and the calorimeters, are described in detail and their efficiencies are evaluated. Finally an example of an application of these techniques to a monojet analysis is given, which demonstrates the importance of such event cleaning techniques for some new physics searches.

    AB - This paper presents a summary of beam-induced backgrounds observed in the ATLAS detector and discusses methods to tag and remove background contaminated events in data. Triggerrate based monitoring of beam-related backgrounds is presented. The correlations of backgrounds with machine conditions, such as residual pressure in the beam-pipe, are discussed. Results from dedicated beam-background simulations are shown, and their qualitative agreement with data is evaluated. Data taken during the passage of unpaired, i.e. non-colliding, proton bunches is used to obtain background-enriched data samples. These are used to identify characteristic features of beam-induced backgrounds, which then are exploited to develop dedicated background tagging tools. These tools, based on observables in the Pixel detector, the muon spectrometer and the calorimeters, are described in detail and their efficiencies are evaluated. Finally an example of an application of these techniques to a monojet analysis is given, which demonstrates the importance of such event cleaning techniques for some new physics searches.

    KW - Accelerator modelling and simulations (multi-particle dynamics

    KW - Analysis and statistical methods

    KW - Pattern recognition, cluster finding, calibration and fitting methods

    KW - Performance of High Energy Physics Detectors

    KW - single-particle dynamics)

    UR - http://www.scopus.com/inward/record.url?scp=84971254240&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84971254240&partnerID=8YFLogxK

    U2 - 10.1088/1748-0221/8/07/P07004

    DO - 10.1088/1748-0221/8/07/P07004

    M3 - Article

    VL - 8

    JO - Journal of Instrumentation

    JF - Journal of Instrumentation

    SN - 1748-0221

    IS - 7

    M1 - P07004

    ER -