Reconstructability and directed flow of short-lived resonances in Au+Au collisions at \sqrt{s_{NN}} = 19.6 and 200 GeV
Year: 2026
Type: article
Abstract: We present a systematic study of the reconstructability and directed flow of short-lived hadronic resonances in Au+Au collisions at $\sqrt{s_{NN}}=19.6$ and $200$ GeV using the UrQMD transport model. The reconstructable fractions of $\rho^0$, $K^{*0}$, and $\Lambda(1520)$ are investigated as functions of charged-particle multiplicity and resonance lifetime. The results show a clear lifetime-dependent ordering, with shorter-lived resonances exhibiting stronger suppression of reconstructability. The directed-flow analysis shows clear differences between resonances and their corresponding stable hadrons in mid-central collisions, whereas these differences are substantially reduced in peripheral collisions. These results demonstrate that hadronic evolution significantly modifies both resonance reconstructability and final-state directed flow, providing complementary probes of the hadronic stage in relativistic heavy-ion collisions.
Source: Chinese Physics C
Authors: Junyi Han, Xialei Jiang, Hongcan Li, Yaping Wang
Institution: Central China Normal University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7202112762