Jet Modification and Hard-Soft Correlations (SoftJet 2024)

Jet modification in the QGP and the hadronic phases with SUBA-Jet framework

29 Sept 2024, 14:30

20m

Koshiba-hall (University of Tokyo)

Session 8

Speaker

Josef Bobek (CTU FNSPE)

Description

We study jet production and modification in lead-lead collisions at the LHC energies within a recently introduced SUBA-Jet framework [1]. The core of the framework is a time-like parton shower that starts with a seed parton with high $Q^2$, as well as realistic fluid dynamic evolution of the medium, simulated using the vHLLE code. The initial seed partons are produced by PYTHIA, whereas the initial state for the medium is modeled with TrENTo model. At particlization, the medium decouples into hadrons. The jet partons lose energy in the medium and hadronize. Jet and medium hadrons rescatterings are simulated using the SMASH hadronic transport. The ingredients above allow to simulate a complete event containing both soft and hard hadrons.

We benchmark the jet energy loss in lead-lead collisions at 5.02 TeV LHC energy in this framework, and, in particular, we examine the influence of hadronic phase on the jet properties. Traditionally, jet modification is assumed to happen solely in the QGP phase, based on arguments of formation time of jet hadrons and low jet transport coefficient in hadronic phase. We argue that the validity of those arguments depends on hadron $p_{\mathrm{T}}$, and as a result the complete jet object can have a visible modification in the hadronic phase, as quantified by different observables.

[1] Iu. Karpenko, A. Lind, M. Rohrmoser, J. Aichelin, P.-B. Gossiaux, arXiv: 2404.14579 [hep-ph]

Presentation materials

Josef Bobek SoftJet.pdf

Josef Bobek SoftJet.pptx