Searching for the dead cone effects with iterative declustering of heavy-flavor jets

Understand

We present a new method to expose the dead cone effect at colliders using iterative declustering techniques.

• Iterative declustering allows to unwind the jet clustering and to access the subjets or branches at different depths of the jet tree.
• Our method consists on declustering the heavy flavour-tagged jet using Cambridge-Achen algorithm following the branch containing the heavy flavour at each step and registering the kinematics of the complementary untagged prong.
• The kinematics of the complementary untagged prong fill a Lund map representing the gluon radiation off the heavy flavour quark at each step of the vacuum shower.