Jet Substructure: Concepts and Tools

Abstract

In this chapter we genuinely start to discuss jet substructure per se. We begin with a generic description of the physics concepts which are at the foundation of jet substructure techniques. We then discuss ideas on how to assess the performance of these tools, including their sheer discriminating power as well as their resilience against non-perturbative effects. The remaining part of the chapter is dedicated to a description of jet substructure techniques themselves, covering an extensive list of tools which we have organised, as much as possible, according to the basic concepts discussed at the beginning of the chapter.