Measurement of forward top pair production in the dilepton channel in pp collisions at s√=13 TeVстатья

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[1] Measurement of forward top pair production in the dilepton channel in pp collisions at s√=13 tev / А. В. Бережной, И. В. Горелов, А. К. Лефлат et al. // Journal of High Energy Physics. — 2018. — Vol. 2018, no. 8. Forward top quark pair production is studied in pp collisions in the μeb final state using a data sample corresponding to an integrated luminosity of 1.93 fb−1 collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. The cross-section is measured in a fiducial region where both leptons have a transverse momentum greater than 20 GeV and a pseudorapidity between 2.0 and 4.5. The quadrature sum of the azimuthal separation and the difference in pseudorapidities, denoted ΔR, between the two leptons must be larger than 0.1. The b-jet axis is required to be separated from both leptons by a ΔR of 0.5, and to have a transverse momentum in excess of 20 GeV and a pseudorapidity between 2.2 and 4.2. The cross-section is measured to be σtt¯=126±19(stat)±16(syst)±5(lumi)fb where the first uncertainty is statistical, the second is systematic, and the third is due to the luminosity determination. The measurement is compatible with the Standard Model prediction. [ DOI ]

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