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HK: Fachverband Physik der Hadronen und Kerne
HK 15: Heavy-Ion Collisions and QCD Phases II
HK 15.3: Vortrag
Dienstag, 17. März 2026, 16:45–17:00, PHIL C 601
Characterising the hot and dense fireball with virtual photons at HADES — •Niklas Schild for the HADES collaboration — TU Darmstadt, Darmstadt, Germany
The High-Acceptance Di-Electron Spectrometer (HADES) at GSI, Darmstadt, investigates heavy-ion and elementary collisions at beam energies of a few GeV, providing valuable insights into QCD matter at high densities and moderate temperatures. One key aspect of HADES is the study of these collisions via rare electromagnetic probes, which offer unique access to the evolution of the system due to their penetrating nature.
In this contribution, we present recent measurements of dielectron production from Ag+Ag collisions at √sNN = 2.55 GeV and √sNN = 2.42 GeV. Expanding on previous results, we aim to study dielectron spectra in a multi-differential manner, considering observables such as invariant mass, centrality, rapidity, and transverse momentum. This not only provides detailed information about the properties of the hot and dense medium created in the collisions, but also allows for a more refined and differential comparison with theoretical models. This will be crucial for advancing our understanding of the thermal radiation emitted by the medium and, as such, can help to further constrain and improve existing descriptions.
This work has been supported by BMFTR and HGS-HIRe.
Keywords: HADES; Heavy-Ion Collisions; Electromagnetic Probes; GSI; Dileptons