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@ARTICLE{OmanaKuttan:363801,
author = {Omana Kuttan, Manjunath and Zhou, Kai and Steinheimer, Jan
and Stöcker, Horst},
title = {{U}ltrafast, event-by-event heavy-ion simulations for
next-generation experiments},
journal = {Physical review / C},
volume = {112},
number = {5},
issn = {2469-9985},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {GSI-2026-00011},
pages = {054907},
year = {2025},
note = {Published by the American Physical Society under the terms
of the Creative Commons Attribution 4.0 International
license. Funded by SCOAP3.},
abstract = {We present a novel deep generative framework that uses
probabilistic diffusion models for ultrafast, event-by-event
simulations of heavy-ion collision output. This new
framework is trained on ultrarelativistic quantum molecular
dynamics (UrQMD) cascade data to generate a full collision
event output containing 26 distinct hadron species. The
output is represented as a point cloud, where each point is
defined by a particle's momentum vector and its
corresponding species information. Our architecture
integrates a normalizing flow-based condition generator that
encodes global event features into a latent vector, and a
diffusion model that synthesizes a point cloud of particles
based on this condition. A detailed description of the model
and an in-depth analysis of its performance is provided. The
conditional point-cloud diffusion model learns to generate
realistic output particles of collision events which
successfully reproduce the UrQMD distributions for
multiplicity, momentum, and rapidity of each hadron type.
The flexible point-cloud representation of the event output
preserves full event-level granularity, enabling direct
application to inverse problems and parameter estimation
tasks while also making it easily adaptable for accelerating
any event-by-event model calculation or detector
simulation.},
cin = {TES},
ddc = {530},
cid = {I:(DE-Ds200)TES-20160901OR397},
pnm = {612 - Cosmic Matter in the Laboratory (POF4-612) / FIAS -
Frankfurt Institute for Advanced Studies (FIAS)},
pid = {G:(DE-HGF)POF4-612 / G:(DE-Ds200)FIAS},
experiment = {$EXP:(DE-Ds200)no_experiment-20200803$},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001630418000005},
doi = {10.1103/wyq5-hlp5},
url = {https://repository.gsi.de/record/363801},
}