The 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 √s(NN) = 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 t tbar signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is σ(t tbar) = 45 ± 8 nb, consistent with predictions from perturbative quantum chromodynamics.
Observation of Top Quark Production in Proton-Nucleus Collisions
Ravera, F.;Meridiani, P.;Amapane, N.;Argiro, S.;Bellan, R.;Costa, M.;Covarelli, R.;Kiani, B.;Migliore, E.;Monaco, V.;Monteil, E.;Obertino, M. M.;Pacher, L.;Romero, A.;Sacchi, R.;Sola, V.;Solano, A.;Rumerio, P.;
2017-01-01
Abstract
The 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 √s(NN) = 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 t tbar signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is σ(t tbar) = 45 ± 8 nb, consistent with predictions from perturbative quantum chromodynamics.| File | Dimensione | Formato | |
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PhysRevLett.119.242001.pdf
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