Speaker
Description
Measurements of normalized differential crosssections of top quark
pair (ttbar) production are presented as a function of the mass, the
transverse momentum and the rapidity of the ttbar system in proton‐
proton collisions at centerofmass energies of sqrt(s) = 7 TeV and 8
TeV. The dataset corresponds to an integrated luminosity of 4.6 fb1
at 7 TeV and 20.2 fb1 at 8 TeV, recorded with the ATLAS detector at
the Large Hadron Collider. Events with top quark pair signatures are
selected in the dilepton final state, requiring exactly two charged
leptons and at least two jets with at least one of the jets
identified as likely to contain a bhadron. The measured
distributions are corrected for detector effects and selection
efficiency to crosssections at the parton level. The differential
crosssections are compared with different Monte Carlo generators and
theoretical calculations of ttbar production. The results are
consistent with the majority of predictions in a wide kinematic
range.
