Speaker
Maria Martin
Description
Jet multiplicity distributions in top-quark pair (ttbar) events are measured with the CMS detector. The measurement is performed in the dilepton and lepton+jets decay channels of the top-quark pairs. The normalised differential ttbar quark cross section is measured as a function of the jet multiplicity for different transverse momentum (pT) thresholds. Furthermore, the distribution of the fraction of events without additional jets above a pT threshold is measured as functions of the leading additional jets transverse momentum and of the scalar sum of the transverse momenta of all additional jets. The data are compared with several predictions from perturbative QCD calculations.
Primary author
Manfred Jeitler
(Austrian Academy of Sciences (AT))
