[PDF] Top 20 Measurement of the t(t)over-bar production cross section using events with one lepton and at least one jet in pp collisions at root s=13 TeV

... CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic ... See full document

... differences in the azimuthal angle (in radians) and pseudorapidity, respectively, between the generated particles and the ...For the purpose of this ... See full document

... addition, at least four jets with p T > 30 GeV and |η| < ...Only the four leading among the jets passing these p T - and η-criteria are used in the ... See full document

... separately and bin-by-bin. The largest deviation in the respective bin is taken as the systematic uncertainty and varies in the range of ...3.8–9.0% ... See full document

... collections of reconstructed particles are produced using a particle-flow (PF) algorithm [19, ...from the PF particles using the anti-k T jet algorithm [21], im- plemented ... See full document

... most of the t
t events. To remove W   events in which photons convert to electron-positron pairs, at least three hits in the silicon tracker are required ... See full document

... Measured jet cross section for anti-k t jets with R = 0.4 in the rapidity bin |y| < ...is the cross section and δ stat. is the statistical ... See full document

... other one leptonically into an electron (W ! e) or a muon (W ! ... lepton with a subsequent decay of the latter into an electron or a muon are included in the signal ... See full document

... detector with a forward-backward symmetric cylindrical geometry. It consists of an inner tracking detector surrounded by a thin supercon- ducting solenoid, electromagnetic and hadronic calorimeters, ... 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

... Values of the discriminant greater than one indicate the presence of a secondary ...improve the purity of the selection, only secondary vertices built from ... See full document

... objects using the anti-k T clustering algorithm [ 35 , 36 ] with a size parameter R of ...0.5. The energy of photons is obtained from the ECAL measure- ...ment. The ... See full document

... signal and the Z/γ ∗ → ee, Z/γ ∗ → μμ, W+jets, tt, single top quark, and diboson (WW, WZ, and ZZ) background processes are modelled through sam- ples of MC simulated ...multijet ... See full document

... neutral and charged PF objects using the anti-k T algorithm [35] with a distance parameter of ...0.4. The charged PF objects are required to be consistent with originating ... See full document

... quark production. The second most important variable is the invariant mass of the reconstructed top quark, which dis- criminates processes with top quarks, from background ... See full document

... tt events contain jets from the hadronization of b quarks, requiring b tagging can re- duce background from events that do not contains b ...vertices and track-based lifetime ... See full document

... nisation, and the underlying event. The M AD G RAPH generator is also used to simulate the W+jets and Drell–Yan (DY) ...Single-top-quark events are simulated using POWHEG ... See full document

... Samples of MC events were generated to study the charac- teristics of signal ...events. The MC programs Pythia 8.186 and Sherpa ...generate the simulated ... See full document

... 2.76 TeV recorded by CMS during the 2011 heavy ion run, as well as ...−1 of pp collisions at the same collision energy recorded in early ...2013. The event ... See full document

... determine the background from events without prompt leptons in the inclusive lepton  jets sample by using loose data samples defined by relaxing the electron ... See full document