# Can We Observe Jet $P_T$-broadening in Heavy-Ion Collisions at the LHC?

## TL;DR

This paper explores the potential to observe jet transverse momentum broadening effects in heavy-ion collisions at the LHC by analyzing jet substructure, specifically the opening angle of groomed jets, to understand the properties of hot QCD matter.

## Contribution

It introduces a method to study jet $P_T$-broadening through the angular distribution of soft drop groomed jets in heavy-ion collisions, accounting for quark and gluon jet fractions.

## Key findings

- Medium modification affects the angular distribution of jets.
- Comparison with ALICE data provides insights into jet transport properties.
- The study highlights the importance of jet substructure observables in heavy-ion physics.

## Abstract

We investigate the effect of PT-broadening on jet substructure observables in heavy-ion collisions at the LHC. As an example, we focus on the opening angle of the two branches that satisfy the soft drop grooming condition in a highly energetic jet. The medium modification of the angular distribution can provide important information on the jet transport properties of hot QCD matter. In addition, we take into account a change of the overall fraction of quark and gluon jets in heavy-ion collisions. We comment on the comparison to a recent measurement from the ALICE Collaboration.