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

2017-05-19Journal article Open access
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dc.contributor.authorATLAS collaboration (2863 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOleiro Seabra, Luis Filipe
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T11:50:19Z
dc.date.available2019-02-04T11:50:19Z
dc.date.issued2017-05-19
dc.date.updated2019-02-04T11:50:19Z
dc.description.abstractThis 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 $\sqrt{s} = 8$  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 $30\,\upmu {\text {m}}$ is achieved for events with high multiplicity of reconstructed tracks. The transverse position resolution is better than $20\,\upmu {\text {m}}$ 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.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C77 (2017) 332; DOI 10.1140/epjc/s10052-017-4887-5
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-017-4887-5
dc.identifier.urihttp://hdl.handle.net/10400.26/27242
dc.language.isoeng
dc.titleReconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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