Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Heavy-Ion Collisions and QCD Phases VIII

HK 50.2: Vortrag

Donnerstag, 13. März 2025, 16:00–16:15, HS 3 Chemie

First Look at Dilepton Flow in Au+Au collisions at √s_NN=2.23 GeV with HADES^* — •Sukyung Kim — Bergische Universität Wuppertal, Wuppertal, Germany

Dileptons are excellent probes for studying the hot, dense hadronic matter created in heavy-ion collisions. Unlike strongly interacting particles, they traverse the medium without interaction, preserving information from all stages of the fireball evolution.

In this contribution, we study the anisotropic flow of dielectrons produced in Au+Au collisions at √s_NN=2.23 GeV, recorded by the High Acceptance DiElectron Spectrometer (HADES) at GSI Darmstadt in March 2024. Recent advances in the calibration of the Ring-Imaging Cherenkov (RICH) detector, leveraging its excellent timing precision, have significantly improved electron purity and enabled more accurate reconstruction of dilepton flow.

This talk will focus on the status and first steps towards deriving the elliptic flow coefficient (v₂) for dielectrons.
^*Work supported by “Netzwerke 2021”, an initiative of the Ministry of Culture and Science of the State of Northrhine Westphalia and BMBF (05P24PX1).

Keywords: Anisotropic flow; dilepton; RICH; HADES