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Study of hard double-parton scattering in four-jet events in pp collisions at √s=7 TeV with the ATLAS experiment

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    0522566 - FZÚ 2020 RIV US 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
    Study of hard double-parton scattering in four-jet events in pp collisions at √s=7 TeV with the ATLAS experiment.
    Journal of High Energy Physics. Roč. 2016, č. 11 (2016), s. 1-52, č. článku 110. ISSN 1029-8479. E-ISSN 1029-8479
    Institucionální podpora: RVO:68378271
    Klíčová slova: ATLAS * CERN LHC Coll * final state: (4jet) * neural network * phase space * jet: rapidity * data analysis method * overlap * jet: transverse momentum
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Obor OECD: Particles and field physics
    Impakt faktor: 6.063, rok: 2016
    Způsob publikování: Open access

    Inclusive four-jet events produced in proton-proton collisions at a centre-of-mass energy of s√=7 TeV are analysed for the presence of hard double-parton scattering using data corresponding to an integrated luminosity of 37.3 pb−1, collected with the ATLAS detector at the LHC. The contribution of hard double-parton scattering to the production of four-jet events is extracted using an artificial neural network, assuming that hard double-parton scattering can be approximated by an uncorrelated overlaying of dijet events. For events containing at least four jets with transverse momentum pT ≥ 20 GeV and pseudorapidity |η| ≤ 4.4, and at least one having pT ≥ 42.5 GeV, the contribution of hard double-parton scattering is estimated to be fDPS = 0.092+ 0.005− 0.011 (stat.)+ 0.033− 0.037 (syst.).
    Trvalý link: http://hdl.handle.net/11104/0307037

     
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