[PDF] Top 20 Measurement of jet activity produced in top-quark events with an electron, a muon and two $b$-tagged jets in the final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

... C. Kourkoumelis 9 , V. Kouskoura 27 , A.B. Kowalewska 42 , R. Kowalewski 172 , T.Z. Kowalski 41a , C. Kozakai 157 , W. Kozanecki 138 , A.S. Kozhin 132 , V.A. Kramarenko 101 , G. Kramberger 78 , D. Krasnopevtsev 100 , ... See full document

... differences in the properties used for lepton identification between prompt, isolated leptons from W and Z boson decays (referred to as “real leptons”) and those where the leptons are ... See full document

... consists of events with a jet that is misreconstructed as a lepton or with a non-prompt lepton that satisfies the lepton identification cri- ...teria. The simulation ... See full document

... One of the primary goals of the ATLAS experiment at the CERN Large Hadron Collider (LHC) is to search for physics beyond the Standard Model ...(BSM). The ... See full document

... Drell-Yan events (Z/γ ∗ +jets) are modeled with the Alpgen generator, using the MLM matching scheme [ 18 ] and the CTEQ6L1 [ 19 ] PDF ...set. The Z/γ ∗ +jets ... See full document

... for the ee and µ µ channels. For the eµ channel, H T is required to be greater than 130 GeV, where H T is the scalar sum of the p T of all muons, electrons and ... See full document

... to the single top-quark final state comes from QCD-produced multijet events in which ei- ther one of the jets is misidentified as an ... See full document

... In the analysis presented here, we select events containing top-quark pairs where each top quark decays weakly via t → bW, with one W boson decaying into a charged ... See full document

... The ATLAS experiment [ 20 ] at the LHC is a multi-purpose particle detector with a forward-backward symmetric cylindrical geometry and a near 4π coverage in solid ... See full document

... study of final states containing a W boson and hadronic jets, produced in proton- proton collisions at a center-of-mass energy of 7 ...TeV. ... See full document

... knowledge of the proton PDFs are eval- uated by reweighting simulated events produced with MadGraph 5_aMC@NLO using the error sets of the NNPDF .... The ... See full document

... is the fine-structure constant, √ ˆs is the centre-of-mass energy of the quark and anti-quark, and θ is the angle between the lepton and ... See full document

... into events with no jets iden- tified as a b-quark jet (0 b-tag control sample) and those with at least one such jet (≥ 1 b-tag tt ... See full document

... multipurpose detector [ 17 ] that provides nearly full solid angle coverage around the interaction ...trajectories with pseudorapidity |η| < 2.5 are reconstructed in the inner ... See full document

... The detector simulation [ 57 ] was performed using either GEANT4 [ 58 ] or a fast simulation framework where the showers in the electromagnetic and hadronic calorimeters are ... See full document

... into two types: those with two real prompt leptons from W or Z boson decays (in- cluding those produced via leptonic τ decays), and those where at least one of ... See full document

... alternative measurement is performed using the KINb method [6] and a tighter event se- ...lection. The jet p T is required to be at least 35 GeV and the ... See full document

... used in this analysis were collected by the ATLAS detector in pp collisions at the LHC with a centre-of-mass energy of 13 ... See full document

... dilepton final states can be efficiently selected using kinematic requirements on the final state ...backgrounds and verify that the dilep- ton final states are ... See full document

... J. Huth 58 , G. Iacobucci 51 , G. Iakovidis 27 , I. Ibragimov 141 , L. Iconomidou-Fayard 117 , E. Ideal 175 , Z. Idrissi 135e , P. Iengo 32 , O. Igonkina 107,u , T. Iizawa 170 , Y. Ikegami 67 , M. Ikeno 67 , Y. Ilchenko ... See full document