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Observation of Top Quark Production in Proton-Nucleus Collisions
CMS Collaboration
CMS Collaboration
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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 √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 t¯t signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is σt¯t=45±8 nb, consistent with predictions from perturbative quantum chromodynamics.
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2017-12-14
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American Physical Society
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CMS_Collab_2017.pdf
Adobe PDF, 538.78 KB
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Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., ... & Del Valle, A. E. (2017). Observation of top quark production in proton-nucleus collisions. Physical review letters, 119(24), 242001.