Measurement of jet multiplicity distributions in t t-bar production in pp collisions at sqrt(s) = 7 TeV (CROSBI ID 228074)
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Podaci o odgovornosti
Khachatryan, Serguei ; ... ; Ferenček, Dinko ; Đurić, Senka ; Godinović, Nikola ; Lelas, Damir ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Kadija, Krešo ; Luetić, Jelena ; Mekterović, Darko ; Morović, Srećko ; Tikvica, Lucija ; ... ; Woods, Nate
engleski
Measurement of jet multiplicity distributions in t t-bar production in pp collisions at sqrt(s) = 7 TeV
The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. The measurement is performed in both the dilepton and lepton + jets decay channels using data corresponding to an integrated luminosity of 5.0 inverse femtobarns. Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the t t-bar production is determined as a function of the additional jet multiplicity in the lepton + jets channel. Furthermore, the fraction of events with no additional jets is measured in the dilepton channel, as a function of the threshold on the jet transverse momentum. The measurements are compared with predictions from perturbative quantum chromodynamics and no significant deviations are observed.
high energy physics ; experimental particle physics ; LHC ; CMS ; standard model
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Podaci o izdanju
74
2015.
3014-1-3014-29
objavljeno
1434-6044
10.1140/epjc/s10052-014-3014-0