Jet probes of QCD matter: single jets and dijets in heavy-ion collisions

TL;DR

This paper investigates how jets are modified in hot QCD matter created in heavy-ion collisions, focusing on inclusive jets and dijets, and highlights the effects of medium interactions on jet behavior.

Contribution

It presents a detailed analysis of jet modifications including initial-state effects and final-state energy loss at ${ m O}(\alpha_s^3)$ in heavy-ion collisions, which is a novel comprehensive study.

Findings

Suppression of inclusive jet spectrum varies with jet radius.

Dijet momentum imbalance is flatter compared to hadron-hadron collisions.

Evidence of jet-medium interaction effects in high-energy nuclear collisions.

Abstract

Modifications of jets in the existence of a hot and dense QCD medium have recently attracted a lot of attentions. In this talk, we demonstrate how jet-medium interactions change the behavior of jets by offering examples of inclusive jet and dijet productions at $ {\cal O}(\alpha_s^3)$ in heavy ion collisions including initial-state cold nuclear effects and especially the final-state parton energy loss effect. The suppression of inclusive jet spectrum varying with jet radii and a flatter dijet momentum imbalance as compared to those in hadron-hadron collisions are observed in high-energy nuclear collisions.