Publications [#321443] of Seog Oh

Papers Published
  1. Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; AbouZeid, O; Abraham, N; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y; Acharya, B; Adamczyk, L; Adams, D; Adelman, J; Adomeit, S; Adye, T; Affolder, A; Agatonovic-Jovin, T; Agricola, J; Aguilar-Saavedra, J; Ahlen, S; Ahmadov, F; Aielli, G; Akerstedt, H; Åkesson, T; Akimov, A; Alberghi, G; Albert, J; Albrand, S; Alconada Verzini, M; Aleksa, M; Aleksandrov, I; Alexa, C; Alexander, G; Alexopoulos, T; Alhroob, M; Ali, B et al., Measurement of the production cross-section using eμ events with b -tagged jets in pp collisions at with the ATLAS detector, Physics Letters B, vol. 761 (October, 2016), pp. 136-157 [doi] .

    © 2016 The Author(s).This paper describes a measurement of the inclusive top quark pair production cross-section (σtt̄) with a data sample of 3.2 fb−1of proton-proton collisions at a centre-of-mass energy of √s=13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron-muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt̄and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt̄ = 818±8 (stat)± 27 (syst)±19 (lumi)± 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented.