A study of the material in the ATLAS inner detector using secondary hadronic interactions

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Journal of Instrumentation

OSTI ID:1046432

Aad, G; Abbott, B; Abdallah, J; Abdelalim, AA; Abdesselam, A; Abdinov, O; Abi, B; Abolins, M; Abramowicz, H; Abreu, H; Acerbi, E; Acharya, BS; Adams, DL; Addy, TN; Adelman, J; Aderholz, M; Adomeit, S; Adragna, P; Adye, T; Aefsky, S ; Aguilar-Saavedra, JA

The ATLAS inner detector is used to reconstruct secondary vertices due to hadronic interactions of primary collision products, so probing the location and amount of material in the inner region of ATLAS. Data collected in 7 TeV pp collisions at the LHC, with a minimum bias trigger, are used for comparisons with simulated events. The reconstructed secondary vertices have spatial resolutions ranging from {approx} 200 {micro}m to 1 mm. The overall material description in the simulation is validated to within an experimental uncertainty of about 7%. This will lead to a better understanding of the reconstruction of various objects such as tracks, leptons, jets, and missing transverse momentum.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1046432
• Report Number(s): BNL-98254-2012-JA; KA1101021; TRN: US1203763
• Journal Information: Journal of Instrumentation, Vol. 7; ISSN 1748-0221
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HADRONS
LEPTONS
PHOTONS
PHYSICS
RADIATIONS
SIMULATION
SPATIAL RESOLUTION
TRANSVERSE MOMENTUM