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



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Ali, S
et al (show 784 more authors) (2018) Measurement of forward top pair production in the dilepton channel in pp collisions at root s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2018 (8). 174-.

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Abstract

Forward top quark pair production is studied in $pp$ collisions in the $\mu eb$ 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 $\Delta R$, between the two leptons must be larger than 0.1. The $b$-jet axis is required to be separated from both leptons by a $\Delta R$ 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 $$\sigma_{t\bar{t}}= 126\pm19\,(\mathrm{stat})\pm16\,(\mathrm{syst})\pm5\,(\mathrm{lumi})\,\,\mathrm{ fb}$$ 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.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-050.html
Uncontrolled Keywords: Hadron-Hadron scattering (experiments), Top physics, Heavy quark production, Jet physics, QCD
Depositing User: Symplectic Admin
Date Deposited: 08 Oct 2018 10:27
Last Modified: 14 Mar 2024 23:30
DOI: 10.1007/JHEP08(2018)174
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3027160