Jet quenching via jet collimation

TL;DR

This paper proposes jet collimation as a mechanism for jet quenching in heavy ion collisions, explaining dijet asymmetry and minimal azimuthal distortion, consistent with experimental observations.

Contribution

It introduces jet collimation as a key process in jet quenching, aligning theoretical predictions with experimental data on dijet asymmetry.

Findings

Jet collimation explains observed dijet asymmetry.

Energy loss causes minimal azimuthal angle distortion.

Transport of soft gluons accounts for jet modifications.

Abstract

The strong modifications of dijet properties in heavy ion collisions measured by ATLAS and CMS provide important constraints on the dynamical mechanisms underlying jet quenching. In this work, we show that the transport of soft gluons away from the jet cone - jet collimation - can account for the observed dijet asymmetry with values of $\hat{q}\, L$ that lie in the expected order of magnitude. Further, we show that the energy loss attained through this mechanism results in a very mild distortion of the azimuthal angle dijet distribution.