Speaker
Description
Jet substructure measurements in heavy-ion collisions provide constraints on jet quenching and the medium response in the QGP. Though there has been remarkable progress in inclusive-charged-hadron jet substructure measurements, understanding the identified particle composition of jets and their modification in heavy-ion collisions remains elusive. Jet quenching models predict that the jet hadrochemical composition may be modified in heavy-ion collisions due to jet-medium interactions, as well as the medium response. Further, models including the jet wake from a hydrodynamic medium response predict an enhancement of soft particle productions at large angles from the jet axis. Measurements of identified particles in jets can help discriminate between various parton-QGP interactions. We present the first measurements of $\pi$, K, and p ratios within charged-particle-jets of various $R$ and the underlying event as a function of particle transverse momentum and radial distance from the jet axis in pp and Pb--Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV. These measurements leverage the excellent PID capabilities of ALICE over a wide momentum range. Additionally, we present results of the particle density profile, $\rho$, for charged particles in jets. We compare the results with theoretical models to understand soft particle production mechanisms and distinguish modified jet fragmentation from bulk effects.
| Category | Experiment |
|---|---|
| Collaboration | ALICE |
