A measurement of material in the ATLAS tracker using secondary hadronic interactions in 7 TeV p p collisions



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2848 more authors) (2016) A measurement of material in the ATLAS tracker using secondary hadronic interactions in 7 TeV p p collisions. JOURNAL OF INSTRUMENTATION, 11 (11). P11020-.

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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 $\sqrt{s}$ = 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 m$^3$ around the interaction point, and agreement is found within overall uncertainties.

Item Type: Article
Additional Information: 28 pages plus author list + cover pages (45 pages total),14 figures, 8 tables, submitted to Journal of Instrum., All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2015-06/
Uncontrolled 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
Depositing User: Symplectic Admin
Date Deposited: 27 Mar 2017 10:22
Last Modified: 19 Jan 2023 07:08
DOI: 10.1088/1748-0221/11/11/P11020
Open Access URL: http://iopscience.iop.org/article/10.1088/1748-022...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006650