Reconstructability and directed flow of short-lived resonances in Au+Au collisions at 19.6 and 200 GeV
Abstract
We present a systematic study of the reconstructability and directed flow of hadronic resonances in Au+Au collisions within the UrQMD transport model. The main objective of this work is to investigate how the hadronic stage influences both resonance reconstructability and the final-state directed flow. A set of short-lived hadronic resonances, including ρ0, K*0, and Λ(1520), is investigated to quantify their yields and reconstructable fractions as a function of charged-particle multiplicity, characterized by (dNch/dη)1/3. We compare results at √(sNN) = 19.6 and 200 GeV to investigate possible energy-dependent differences in the reconstructability. Such differences reflect variations in the properties of the hadronic medium. The results are further examined as a function of resonance lifetime, revealing a clear ordering of reconstructability among different resonances. Overall, the reconstructability is found to be primarily governed by resonance lifetime. The directed-flow analysis reveals clear differences between resonances and their corresponding stable hadrons in mid-central collisions, while these differences become significantly weaker in peripheral collisions, highlighting the important role of hadronic evolution in shaping the final-state directed flow. These studies provide a unified picture of how the hadronic stage influences both resonance reconstructability and directed flow, offering new insights into resonance observables in relativistic heavy-ion collisions.
Versions
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BibTeX
@misc{han2026reconstructability,
title = {{Reconstructability and directed flow of short-lived resonances in Au+Au collisions at 19.6 and 200 GeV}},
author = {Junyi Han and Xialei Jiang and Hongcan Li and Yaping Wang},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.06444},
eprint = {2608.06444},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.06444},
}
RIS
TY - UNPB
TI - Reconstructability and directed flow of short-lived resonances in Au+Au collisions at 19.6 and 200 GeV
AU - Junyi Han
AU - Xialei Jiang
AU - Hongcan Li
AU - Yaping Wang
PY - 2026
DA - 2026/08/06
PB - arXiv
DO - 10.48550/arxiv.2608.06444
UR - https://arxiv.org/abs/2608.06444
AB - We present a systematic study of the reconstructability and directed flow of hadronic resonances in Au+Au collisions within the UrQMD transport model. The main objective of this work is to investigate how the hadronic stage influences both resonance reconstructability and the final-state directed flow. A set of short-lived hadronic resonances, including ρ^0, K^*0, and Λ(1520), is investigated to quantify their yields and reconstructable fractions as a function of charged-particle multiplicity, characterized by (dN_ch/dη)^1/3. We compare results at √(s_NN) = 19.6 and 200 GeV to investigate possible energy-dependent differences in the reconstructability. Such differences reflect variations in the properties of the hadronic medium. The results are further examined as a function of resonance lifetime, revealing a clear ordering of reconstructability among different resonances. Overall, the reconstructability is found to be primarily governed by resonance lifetime. The directed-flow analysis reveals clear differences between resonances and their corresponding stable hadrons in mid-central collisions, while these differences become significantly weaker in peripheral collisions, highlighting the important role of hadronic evolution in shaping the final-state directed flow. These studies provide a unified picture of how the hadronic stage influences both resonance reconstructability and directed flow, offering new insights into resonance observables in relativistic heavy-ion collisions.
ER -