On similarity of jet quenching and charmonia suppression

TL;DR

This paper compares jet quenching and charmonia suppression in heavy-ion collisions, revealing a surprising similarity in their energy loss mechanisms and extracting the effective color factor from LHC data.

Contribution

It introduces a novel comparison between jet quenching and charmonia suppression, highlighting their underlying similarity and quantifying the parton energy loss in lead-lead collisions.

Findings

Effective color factor differs between quark and gluon jets

Similar magnitude of energy loss for jets and charmonia

Discussion of potential common underlying mechanisms

Abstract

We quantify the magnitude of the parton energy loss in jets in lead-lead collisions at the LHC. We extract the effective color factor characterizing the difference between the in-medium radiation of quark-initiated jets and gluon-initiated jets from the data. Then, we examine the energy loss of prompt charmonia and we point to a remarkable similarity between the quenching of light-quark-initiated jets and the prompt charmonia suppression. Finally, we discuss possible sources of this similarity.