en
Scientific article
Open access
English

Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC

ContributorsATLAS Collaboration
Published inEuropean physical journal. C, Particles and fields, vol. 77, no. 5, 332
Collection
  • Open Access - SCOAP3
Publication date2017
Abstract

This paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of s=8 TeV. The performance has been measured as a function of the number of interactions per bunch crossing over a wide range, from one to seventy. The measurement of the position and size of the luminous region and its use as a constraint to improve the primary vertex resolution are discussed. A longitudinal vertex position resolution of about 30μm is achieved for events with high multiplicity of reconstructed tracks. The transverse position resolution is better than 20μm and is dominated by the precision on the size of the luminous region. An analytical model is proposed to describe the primary vertex reconstruction efficiency as a function of the number of interactions per bunch crossing and of the longitudinal size of the luminous region. Agreement between the data and the predictions of this model is better than 3% up to seventy interactions per bunch crossing.

Citation (ISO format)
ATLAS Collaboration. Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC. In: European physical journal. C, Particles and fields, 2017, vol. 77, n° 5, p. 332. doi: 10.1140/epjc/s10052-017-4887-5
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal1434-6044
334views
178downloads

Technical informations

Creation06/01/2017 2:08:42 PM
First validation06/01/2017 2:08:42 PM
Update time03/15/2023 1:44:06 AM
Status update03/15/2023 1:44:05 AM
Last indexation02/12/2024 11:27:41 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack