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Study of the material of the ATLAS inner detector for Run 2 of the LHC

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dc.contributor.author Aaboud, M.
dc.contributor.author Albert, Justin
dc.contributor.author Chiu, Y. H.
dc.contributor.author Elliot, Alison A.
dc.contributor.author Fincke-Keeler, J.
dc.contributor.author Hamano, Kenji
dc.contributor.author Hill, Ewan Chin
dc.contributor.author Keeler, Richard
dc.contributor.author Kowalewski, Robert
dc.contributor.author Kuwertz, E. S.
dc.contributor.author Kwan, Tony
dc.contributor.author LeBlanc, Matthew Edgar
dc.contributor.author Lefebvre, Michel
dc.contributor.author McPherson, Robert A.
dc.contributor.author Seuster, Rolf
dc.contributor.author Sobie, Randall J.
dc.contributor.author Trovatelli, M.
dc.contributor.author Venturi, M.
dc.contributor.author ATLAS Collaboration
dc.date.accessioned 2020-02-18T18:08:28Z
dc.date.available 2020-02-18T18:08:28Z
dc.date.copyright 2017 en_US
dc.date.issued 2017
dc.identifier.citation Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Abeloos, B.; … & Zwalinski, L. (2017). Study of the material of the ATLAS inner detector for Run 2 of the LHC. Journal of Instrumentation, 12, article P12009. DOI: 10.1088/1748- 0221/12/12/P12009 en_US
dc.identifier.uri https://doi.org/10.1088/1748-0221/12/12/P12009
dc.identifier.uri https://arxiv.org/abs/1707.02826
dc.identifier.uri http://hdl.handle.net/1828/11571
dc.description.abstract The ATLAS inner detector comprises three different sub-detectors: the pixel detector, the silicon strip tracker, and the transition-radiation drift-tube tracker. The Insertable B-Layer, a new innermost pixel layer, was installed during the shutdown period in 2014, together with modifications to the layout of the cables and support structures of the existing pixel detector. The material in the inner detector is studied with several methods, using a low-luminosity √s=13 TeV pp collision sample corresponding to around 2.0 nb−1 collected in 2015 with the ATLAS experiment at the LHC. In this paper, the material within the innermost barrel region is studied using reconstructed hadronic interaction and photon conversion vertices. For the forward rapidity region, the material is probed by a measurement of the efficiency with which single tracks reconstructed from pixel detector hits alone can be extended with hits on the track in the strip layers. The results of these studies have been taken into account in an improved description of the material in the ATLAS inner detector simulation, resulting in a reduction in the uncertainties associated with the charged-particle reconstruction efficiency determined from simulation. en_US
dc.description.sponsorship We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DSM/IRFU, France; SRNSF, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, ERDF, FP7, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex and Idex, ANR, Region Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; CERCA Programme Generalitat de Catalunya, Generalitat Valenciana, Spain; the Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, theATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF(Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [33]. en_US
dc.language.iso en en_US
dc.publisher Journal of Instrumentation en_US
dc.subject Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc) en_US
dc.subject Particle tracking detectors en_US
dc.subject Performance of High Energy Physics Detectors en_US
dc.title Study of the material of the ATLAS inner detector for Run 2 of the LHC en_US
dc.type Article en_US
dc.description.scholarlevel Faculty en_US
dc.description.reviewstatus Reviewed en_US


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