Measurement of the cross section for tt¯tt¯ production with additional jets and b jets in pp collisions at √s = 13 TeV; Journal of High Energy Physics; Vol. 2020, iss. 7

Measurement of the cross section for tt¯tt¯ production with additional jets and b jets in pp collisions at √s = 13 TeV; Journal of High Energy Physics; Vol. 2020, iss. 7

מידע ביבליוגרפי
Parent link:Journal of High Energy Physics
Vol. 2020, iss. 7.— 2020.— [125, 45 p.]
מחבר תאגידי: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
מחברים אחרים: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Bergauer Th. Thomas, Zhokin A. S. Aleksandr Sergeevich, Babaev A. A. Anton Anatoljevich, Okhotnikov V. V. Vitaly Vladimirovich
סיכום:Title screen
Measurements of the cross section for the production of top quark pairs in association with a pair of jets from bottom quarks (σtt¯bb¯¯¯)(σtt¯bb¯) and in association with a pair of jets from quarks of any flavor or gluons (σtt¯jj)(σtt¯jj) and their ratio are presented. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. The measurements are performed in a fiducial phase space and extrapolated to the full phase space, separately for the dilepton and lepton+jets channels, where lepton corresponds to either an electron or a muon. The results of the measurements in the fiducial phase space for the dilepton and lepton+jets channels, respectively, are σtt¯jjσtt¯jj = 2.36±0.02 (stat)±0.20 (syst) pb and 31.0±0.2 (stat)±2.9 (syst) pb, and for the cross section ratio 0.017 ± 0.001 (stat) ± 0.001 (syst) and 0.020 ± 0.001 (stat) ± 0.001 (syst). The values of σtt¯bb¯¯¯σtt¯bb¯ are determined from the product of the σtt¯jjσtt¯jj and the cross section ratio, obtaining, respectively, 0.040±0.002 (stat)±0.005 (syst) pb and 0.62±0.03 (stat)±0.07 (syst) pb. These measurements are the most precise to date and are consistent, within the uncertainties, with the standard model expectations obtained using a matrix element calculation at next-to-leading order in quantum chromodynamics matched to a parton shower.
Режим доступа: по договору с организацией-держателем ресурса
שפה:אנגלית
יצא לאור: 2020
נושאים:
электронный ресурс
труды учёных ТПУ
Hadron-Hadron scattering (experiments)
Top physics
Jets
адрон-адронное рассеяние
גישה מקוונת:https://doi.org/10.1007/JHEP07(2020)125
פורמט: אלקטרוני Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663199

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