TY  - CONF
AU  - Sirimanna, Chathuranga
AU  - JETSCAPE Collaboration
TI  - Interplay of prompt and non-prompt photons in photon-triggered jet observables
JO  - The European physical journal / Web of Conferences
VL  - 339
IS  - arXiv:2507.00905
SN  - 2100-014X
CY  - Les Ulis
PB  - EDP Sciences
M1  - GSI-2026-00162
M1  - arXiv:2507.00905
SP  - 05002
PY  - 2025
N1  - This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (https://creativecommons.org/licenses/by/4.0/).
AB  - Prompt photons are important yet challenging to observe in relativistic heavy-ion collisions, as they are produced in the early stages and traverse almost the entire QGP medium without interaction. Experimental analyses typically employ isolation cuts, in the hope to identify prompt photons. Most theoretical studies consider only events with actual prompt photons, assuming no contribution from isolated non-prompt photons to reduce computational cost. For the first time, we present a study that compares simulation results generated using inclusive (bremsstrahlung) and prompt-photon events with multiple experimental observables for both p − p and Pb − Pb collisions at 5.02 TeV. Simulations are carried out using the multi-stage JETSCAPE framework tuned to describe the quenching of jets and hadrons. Isolated non-prompt photons are generated in hard photon bremsstrahlung, where the photon is radiated at a sufficient angle to the jet. Several photon triggered jet and jet substructure observables show significant contributions from inclusive photons, yielding an improvement in comparison with experimental data. Novel photon triggered jet substructure observables are also expected to show new structures, yet to be detected in experiment. This effort examines the significance of isolated nonprompt photons using parameters tuned for a simultaneous description of the leading hadron and jet spectrum, and thus provides an independent verification of the multistage evolution framework.
T2  - 12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions
CY  - 22 Sep 2024 - 27 Sep 2024, Nagasaki (Japan)
Y2  - 22 Sep 2024 - 27 Sep 2024
M2  - Nagasaki, Japan
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1051/epjconf/202533905002
UR  - https://repository.gsi.de/record/363959
ER  -