Jet substructure at the Large Hadron Collider

Jets are collimated sprays of particles, produced in abundance in high energy particle collisions and play a central role in the physics of fundamental particles: they provide key insights into the structure of the strong force and are indispensable in the study of the couplings of the Higgs boson to heavy quarks. Investigations of jet substructure enable measurements in unexplored kinematic regimes and may reveal new processes, while posing interesting theoretical and experimental challenges particularly in the era of the CERN Large Hadron Collider. This article reviews the development and use of the jet substructure techniques by ATLAS and CMS experiments at the LHC.