Computing $N$-subjettiness for boosted jets

Understand

Jet substructure tools have proven useful in a number of high-energy particle-physics studies.

• A particular case is the discrimination, or tagging, between a boosted jet originated from an electroweak boson (signal), and a standard QCD parton (background).
• A common way to achieve this is to cut on a measure of the radiation inside the jet, i.e.
• a jet shape.