Bilki, Burak., ve diğer2019-07-172019-07-1720170031-9007https://doi.org/10.1103/PhysRevLett.119.242001The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of ? sNN = 8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 nb?1 . The significance of the tt signal against the background-only hypothesis is above five standard deviations. The measured cross section is ?tt = 45 ± 8 nb, consistent with predictions from perturbative quantum chromodynamics.enArticle10.1103/PhysRevLett.119.2420012-s2.0-8503859761829286735Q1WOS:000417934800002Q1