Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/114597
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Type: Journal article
Title: A measurement of material in the ATLAS tracker using secondary hadronic interactions in 7 TeV p p collisions
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
et al.
Citation: Journal of Instrumentation, 2016; 11(11):P11020-1-P11020-40
Publisher: IOP Publishing
Issue Date: 2016
ISSN: 1748-0221
1748-0221
Statement of
Responsibility: 
M. Aaboud, G. Aad, B. Abbott … Paul D. Jackson … Andreas Petridis ... Martin White … et al.
Abstract: Knowledge of the material in the ATLAS inner tracking detector is crucial in understanding the reconstruction of charged-particle tracks, the performance of algorithms that identify jets containing b-hadrons and is also essential to reduce background in searches for exotic particles that can decay within the inner detector volume. Interactions of primary hadrons produced in pp collisions with the material in the inner detector are used to map the location and amount of this material. The hadronic interactions of primary particles may result in secondary vertices, which in this analysis are reconstructed by an inclusive vertex-finding algorithm. Data were collected using minimum-bias triggers by the ATLAS detector operating at the LHC during 2010 at centre-of-mass energy √s = 7 TeV, and correspond to an integrated luminosity of 19 nb−1. Kinematic properties of these secondary vertices are used to study the validity of the modelling of hadronic interactions in simulation. Secondary-vertex yields are compared between data and simulation over a volume of about 0.7 m3 around the interaction point, and agreement is found within overall uncertainties.
Keywords: Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc); Performance of High Energy Physics Detectors
Rights: © CERN 2016 for the benefit of the ATLAS collaboration, published under the terms of the Creative CommonsAttribution 3.0 License by IOP Publishing Ltd and Sissa Medialab srl. Any further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation and DOI.
RMID: 0030071623
DOI: 10.1088/1748-0221/11/11/P11020
Appears in Collections:Physics publications

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