CERN Accelerating science

Article
Report number arXiv:1303.0223 ; CERN-PH-EP-2012-313 ; CERN-PH-EP-2012-313
Title Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run
Related titleCharacterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run
Author(s) ATLAS Collaboration  Mostra tots els 2914 autors
Publication 2013-07-17
Imprint 05 Mar 2013
Number of pages 58
Note Comments: 54 pages plus author list (67 pages total), 36 figures, 5 tables, submitted to JINST, revision matches published version, all figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/DAPR-2012-01/
54 pages plus author list (67 pages total), 36 figures, 5 tables, submitted to JINST, revision matches published version, all figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/DAPR-2012-01/
In: JINST 8 (2013) P07004
DOI 10.1088/1748-0221/8/07/P07004
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords detector ; global features ; experimental results
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. Trigger-rate 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.
Copyright/License publication: © 2013-2025 CERN (License: CC-BY-3.0)
preprint: © 2013-2025 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: ATLAS-publication-committee-chair@cern.ch


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