Assessing the impact of parton masses in the fragmentation of high-energy particles has been a longstanding goal of experimental and theoretical communities in QCD. One of the most prominent characteristics of a massive splitting is the suppression of collinear branchings, the dead-cone effect.
Jet substructure techniques are now routinely used in collider phenomenology. This specialised workshop evolves around a recent tool called the Lund Jet Plane(s). The main idea is to use the Cambridge/Aachen clustering technique (i.e.