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!

Medium response and jet shape modification in quark-gluon plasma

May 16, 2018, 6:30 PM
Sala Perla, 1st Floor (Palazzo del Casinò)

Sala Perla, 1st Floor

Palazzo del Casinò

Parallel Talk Jet modifications and high-pT hadrons Jet modifications and high-pT hadrons


Chanwook Park (McGill University)


In this talk, we present the MARTINI study of the modification of jet shapes in quark-gluon plasma. The focus of this study is the effect of medium response on the jet shape function in PbPb collisions at $\sqrt{s}$ = 2.76 and 5.02TeV. As a jet parton propagates, the medium must respond to the energy and momentum
deposited by the jet parton. The medium response thus re-distributes the lost energy around the jet axis, which manifests as the change in the jet-shape function.

To realize the effect of the medium back-reaction, we start with an IP-Glasma event with the corresponding map of binary collisions. The IP-Glasma event then initializes a 3+1D MUSIC hydro event while the map is used to initiate PYTHIA jets. After the initial hydro runs, we let jets propagate in the evolving medium and record the loss of the energy-momentum along the trajectories, keeping careful track of recoiling thermal partons as well as the jet parton shower. MUSIC is then re-run with the same initial condition but with the additional energy-momentum sources representing the lost energy-momentum of the hard partons, and this time we include the UrQMD afterburner. The hadronized hard partons are then combined with the soft hadrons for the reconstruction of jets. Using this realistic event-by-event simulation, we show that the presence of the medium back-reaction including the effect of recoiling thermal partons significantly influences the jet shape function.

Content type Theory
Centralised submission by Collaboration Presenter name already specified

Primary author

Chanwook Park (McGill University)


Mayank Singh (McGill University) Sangyong Jeon (McGill University) Charles Gale (McGill University)

Presentation materials