0434678 - FZÚ 2015 RIV DE eng J - Journal Article
Aad, G. - Abbott, B. - Abdallah, J. - Böhm, Jan - Chudoba, Jiří - Havránek, Miroslav - Hejbal, Jiří - Jakoubek, Tomáš - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Myška, M. - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Vrba, Václav … Total 2879 authors
Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector.
European Physical Journal C. Roč. 74, č. 8 (2014), "3023-1"-"3023-33". ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) LG13009
Institutional support: RVO:68378271
Keywords : gluon * jet * numerical calculations * Monte Carlo * p p * scattering * efficiency * ATLAS * tracking detector * CERN LHC Coll * acceptance * quark
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 5.084, year: 2014

A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb−1 of proton–proton collision data at s√=7 TeV collected with the ATLAS detector at the LHC. Data samples with enriched quark or gluon content are used in the construction and validation of templates of jet properties that are the input to the likelihood-based discriminant. The discriminating power of the jet tagger is established in both data and Monte Carlo samples within a systematic uncertainty of ≈ 10–20 %. In data, light-quark jets can be tagged with an efficiency of ≈50% while achieving a gluon-jet mis-tag rate of ≈25% in a pT range between 40 GeV and 360 GeV for jets in the acceptance of the tracker.
Permanent Link: http://hdl.handle.net/11104/0238662