Model uncertainties in top-quark physics
  The ATLAS and CMS collaborations at the Large Hadron Collider (LHC) are studying the top quark in pp collisions at 7 and 8 TeV. Due to the large integrated luminosity, precision measurements of production cross-sections and properties are often limited by systematic uncertainties. An overview of the modeling uncertainties for simulated events is given in this report. 
Markus Seidel (for the ATLAS and CMS Collaborations)
hep-ex hep-ph