Measurement of the inclusive <i>t</i>(<i>t</i>)over-bar production cross section in the lepton plus jets channel in <i>pp</i> collisions at √<i>s</i>=7 TeV with the ATLAS detector using support vector machines


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Jackson P., Oliver J., Petridis A., Qureshi A., Sharma A., White M., ...More

PHYSICAL REVIEW D, vol.108, no.3, 2023 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 108 Issue: 3
  • Publication Date: 2023
  • Doi Number: 10.1103/physrevd.108.032014
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH
  • Ankara University Affiliated: Yes

Abstract

A measurement of the top quark pair-production cross section in the lepton + jets decay channel is presented. It is based on 4.6 fb(-1) of root s = 7 TeV pp collision data collected during 2011 by the ATLAS experiment at the CERN Large Hadron Collider. A three-class, multidimensional event classifier based on support vector machines is used to differentiate t (T) over bar events from backgrounds. The tt production cross section is found to be sigma(t (t) over bar) = 168.5 +/- 0.7(stat)(-5.9)(+6.2) (syst)(-3.2)(+3.4) (lumi) pb. The result is consistent with the Standard Model prediction based on QCD calculations at next-to-next-to-leading order.