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The top quark pair production cross section is measured for the first time in proton-proton collisions at √s=13 TeV by the CMS experiment at the CERN LHC, using data corresponding to an integrated luminosity of 43 pb−1. The measurement is performed by analyzing events with at least one electron and one muon of opposite charge, and at least two jets. The measured cross section is 746±58(stat)±53(syst)±36(lumi) pb, in agreement with the expectation from the standard model.
Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., ... & Flechl, M. (2016). Measurement of the top quark pair production cross section in proton-proton collisions at s= 13 TeV. Physical review letters, 116(5), 052002.
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