Abstract
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 fb−1. Using a procedure to associate jets to decay products of the top quarks, the differential cross sectionof the tt‾ 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.
Original language | English |
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Article number | 3014 |
Number of pages | 29 |
Journal | European Physical Journal C |
Volume | 74 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |
Keywords
- Collisions
- Proton–proton collisions
- Jets