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Measurement of the integrated and differential t-tbar production cross sections for high-pt top quarks in pp collisions at sqrt(s) = 8 TeV (CROSBI ID 239196)

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(CMS Collaboration) Khachatryan, Vardan ; ... ; Pleština, R. ; ... ; Godinović, Nikola ; Lelas, Damir ; Puljak, Ivica ; ... ; Antunović, Željko ; Kovač, Marko et al. Measurement of the integrated and differential t-tbar production cross sections for high-pt top quarks in pp collisions at sqrt(s) = 8 TeV // Physical review. D, 94 (2016), 072002, 25. doi: 10.1103/PhysRevD.94.072002

Podaci o odgovornosti

Khachatryan, Vardan ; ... ; Pleština, R. ; ... ; Godinović, Nikola ; Lelas, Damir ; Puljak, Ivica ; ... ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Kadija, Krešo ; Luetić, Jelena ; Mićanović, Saša ; Sudić, Lucija ; ... ; Morović, Srećko ; ... ; Ferenček, Dinko ; ... ; Đurić, Senka ; ... ; Woods, Nate

CMS Collaboration

engleski

Measurement of the integrated and differential t-tbar production cross sections for high-pt top quarks in pp collisions at sqrt(s) = 8 TeV

The cross section for pair production of top quarks (t-tbar) with high transverse momenta is measured in pp collisions, collected with the CMS detector at the LHC with sqrt(s) = 8 TeV in data corresponding to an integrated luminosity of 19.7 inverse femtobarns. The measurement is performed using lepton+jets events, where one top quark decays semileptonically, while the second top quark decays to a hadronic final state. The hadronic decay is reconstructed as a single, large-radius jet, and identified as a top quark candidate using jet substructure techniques. The integrated cross section and the differential cross sections as a function of top quark pt and rapidity are measured at particle level within a fiducial region related to the detector- level requirements and at parton level. The particle-level integrated cross section is found to be sigma[t-tbar] = 0.499 +/- 0.035 (stat+syst) +/- 0.095 (theory) +/- 0.013 (lumi) pb for top quark pt > 400 GeV. The parton-level measurement is sigma[t-tbar] = 1.44 +/- 0.10 (stat+syst) +/- 0.29 (theory) +/- 0.04 (lumi) pb. The integrated and differential cross section results are compared to predictions from several event generators.

High energy physics, Experimental particle physics, LHC, CMS, Standard Model

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Podaci o izdanju

94

2016.

072002

25

objavljeno

2470-0010

2470-0029

10.1103/PhysRevD.94.072002

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Fizika

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