Matrix Elements, Parton Showers and Jet Merging: Jet Substructure and   New Physics at the LHC
  Events containing hadronically decaying heavy particles with large momentum, leading to so-called merged jets, are expected to play a significant role in both searches for new physics and measurements of Standard Model processes at the CERN Large Hadron Collider. In this article, a comparative study of the modeling of such merged jet topologies by different Monte-Carlo event generators is presented. The observed differences emphasize the need to refine such modeling based on the observation of Standard Model processes prior to claims of discovery. 
Andrew Altheimer and Gustaaf Brooijmans
hep-ex