Recent progress on the understanding of the medium-induced jet evolution and energy loss in pQCD

TL;DR

This paper reviews recent theoretical advances in understanding how jets lose energy and evolve within quark-gluon plasma, focusing on medium-induced effects, interference patterns, and potential probabilistic models.

Contribution

It provides a comprehensive overview of recent perturbative QCD developments in jet-medium interactions, including beyond eikonal approximations and color coherence effects.

Findings

Identification of key energy loss mechanisms

Analysis of interference pattern modifications

Proposal of probabilistic models for dense media

Abstract

Motivated by the striking modifications of jets observed both at RHIC and the LHC, significant progress towards the understanding of jet dynamics within QGP has occurred over the last few years. In this talk, I review the recent theoretical developments in the study of medium-induced jet evolution and energy loss within a perturbative framework. The main mechanisms of energy loss and broadening will be firstly addressed with focus on leading particle calculations beyond the eikonal approximation. Then, I will provide an overview of the modifications of the interference pattern between the different parton emitters that build up the parton shower when propagating through an extended coloured medium. I will show that the interplay between color coherence/decoherence that arises from such effects is the main mechanism for the modification of the jet core angular structure. Finally, I discuss the possibility of a probabilistic picture of the parton shower evolution in the limit of a very dense or infinite medium.