Study of path-length dependent energy loss of jets in p--Pb and Pb--Pb collisions with ALICE

TL;DR

This paper presents recent ALICE experimental results on jet quenching in p--Pb and Pb--Pb collisions, focusing on path-length dependence to better understand the underlying mechanisms of jet energy loss in quark-gluon plasma.

Contribution

It provides new experimental insights into the path-length dependence of jet energy loss through event-shape engineered spectra, jet-particle v2, and correlation studies.

Findings

Evidence of path-length dependence in jet quenching signals.

Insights into jet-medium interactions from correlation analyses.

Constraints on theoretical models of jet energy loss.

Abstract

Jet quenching, a standard signature of quark--gluon plasma (QGP) formation in which jets lose energy by traversing the medium, comprises a well-studied set of observables in heavy-ion collisions. Significant questions remain, however, concerning the mechanisms driving this phenomenon. Theoretical work that attempts to address these open questions offers the path-length dependence of jet energy loss as one way to better understand the underlying mechanisms of jet quenching. It has proven challenging, however, to derive explicit values for the path-length dependence from experimental data. These proceedings discuss recent results from ALICE that attempt to contribute to our understanding of this phenomenon, including results of event-shape engineered jet spectra, the jet-particle $v_{2}$, and correlation studies between hard triggers and hadrons.