# Quark Matter 2018

May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Interpreting jet quenching measurements and charmonia suppression

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Jet modifications and high-pT hadrons

### Speaker

Martin Spousta (Charles University)

### Description

Understanding the energy loss of partons traversing the strongly interacting matter created in heavy ion collisions is one of key goals of the heavy ion physics program. In this talk we present results of phenomenological analyses of various recent jet quenching data. The core of the model used in these analyses is based on the shift formalism which allows for an extraction of the magnitude of parton energy loss from the data with minimal assumptions on the underlying physics mechanisms. The model is capable of describing the full $p_{T}$, rapidity, and centrality dependence of the measured jet $R_{AA}$ using three effective parameters. The analysis done using this simple model can explain the shape of the modification of fragmentation functions observed in the data as well as the relation between the magnitude of the jet $R_{AA}$ and the $R_{AA}$ of charged particles. The analysis of recent data on splitting functions and fragmentation functions allows for further constrains on the role of coherence effects in the parton energy loss. Further, the analysis of charmonia suppression using this model points to a remarkable similarity between the quenching of light-quark-initiated jets and the prompt charmonia suppression. In this talk, we also discuss possible explanations of intriguing features seen in the recently published dijet asymmetry measurement by ATLAS and differences in how fragmentation patterns are modified for inclusive jets compared to those in the gamma-jet system.

Content type Theory Presenter name will be specified later

### Primary authors

Martin Spousta (Charles University) Brian Cole (Columbia University (US)) Souvik Priyam Adhya (Department of Atomic Energy (IN)) Dennis Perepelitsa (University of Colorado Boulder)