Speaker
Description
The study of jets and jet fragmentation plays a large role in understanding parton evolution within the Quark-Gluon Plasma (QGP). In QCD emissions from jets, photons can fragment from quarks, but these fragmentation photons have not been thoroughly investigated in the context of Heavy-ion Collisions. They could offer insight for investigating jet energy loss mechanisms in the QGP medium. This work utilizes the JETSCAPE framework to select particles inside jets, extracting their momentum fraction z=pTπ/pTjet and angular separation ΔR relative to the jet axis. The main goal is to investigate jet energy loss by analyzing modifications in the fragmentation function and jet shape, specifically for Au+Au collision simulations at 200 GeV (RHIC energies). The analysis first focuses on charged pions, and then extends to photons, within a jet cone radius of 0.4, and restricts all particles to the pseudorapidity range ∣η∣<1.1. Simulation results from the charged pion fragmentation function could provide valuable information on what to look for if there are any signatures of energy loss from fragmentation photons. This study aims to prepare for medium-modified fragmentation function measurements using sPHENIX data from Run2025, offering an opportunity for experimental validation.
