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

0485282 - FZÚ 2018 RIV DE eng J - Článek v odborném periodiku
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Havránek, Miroslav - Hejbal, Jiří - Jakoubek, Tomáš - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Vrba, Václav … celkem 2855 autorů
Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC.
European Physical Journal C. Roč. 77, č. 5 (2017), s. 1-35, č. článku 332. ISSN 1434-6044. E-ISSN 1434-6052
Institucionální podpora: RVO:68378271
Klíčová slova: vertex: primary * track data analysis * p p: scattering * spatial resolutio * performance * ATLAS * efficiency
Obor OECD: Particles and field physics
Impakt faktor: 5.172, rok: 2017

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 30upmum is achieved for events with high multiplicity of reconstructed tracks. The transverse position resolution is better than 20upmum 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.
Trvalý link: http://hdl.handle.net/11104/0280351