We thank CERN and the ATLAS and CMS Collaborations, the participants and organizers of the Boost Workshops held in Zurich12 2016 and Buffalo13 2017 for discussions and input,and Jon Butterworth for suggesting this jet substructure reviewarticle. We also thank Andrew Larkoski and Ian Moult for thecollaboration on the theoretical review. R. K., B. N., and A. S.are the editors for this review. This work was supported by the U.S. Department of Energy, Office of Science under ContractNo. DE-AC02-05CH11231. We acknowledge the support of the German Ministry for Education and Science (BMBF), the German Research Foundation (DFG), and the European Research Council (ERC).

Jet substructure has emerged to play a central role at the Large Hadron Collider, where it has provided numerous innovative ways to search for new physics and to probe the standard model, particularly in extreme regions of phase space. This review focuses on the development and use of state-of-the-art jet substructure techniques by the ATLAS and CMS experiments.