Probing heavy ion collisions using quark and gluon jet substructure

Understand

We study the phenomenon of jet quenching utilizing quark and gluon jet substructures as independent probes of heavy ion collisions.

• We exploit jet and subjet features to highlight differences between quark and gluon jets in vacuum and in a medium with the jet-quenching model implemented in JEWEL.
• We begin with a physics-motivated, multivariate analysis of jet substructure observables including the jet mass, the radial moments, the $p_T^D$ and the pixel multiplicity.
• In comparison, we employ state-of-the-art image-recognition techniques by training a deep convolutional neutral network on jet images.