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Publication - Dr Henning Flaecher

    Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV

    Citation

    Aggleton, R, Ball, F, Beck, L, Brooke, J, Burns, D, Clement, E, Cussans, D, Flächer, H, Goldstein, J, Grimes, M, Heath, G, Heath, H, Jacob, J, Kreczko, L, Lucas, C, Newbold, D, Paramesvaran, S, Poll, T, Sakuma, T, El Nasr, SS, Smith, D, Smith, V & , 2018, ‘Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV’. Physics Letters B, vol 776., pp. 355-378

    Abstract

    The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯tt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb−1collected in pp collisions at s=13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected. In the full phase space, the measured ratio is 0.022±0.003(stat)±0.006(syst), the cross section σtt¯bb¯ is 4.0±0.6(stat)±1.3(syst) pb and σtt¯jj is 184±6(stat)±33(syst) pb. The measurements are compared with the standard model expectations obtained from a POWHEG simulation at next-to-leading-order interfaced with PYTHIA.

    Full details in the University publications repository