Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Heavy-Ion Collisions and QCD Phases VIII
HK 36.1: Gruppenbericht
Mittwoch, 30. März 2022, 14:00–14:30, HK-H2
Charged pion emission from central heavy-ion collisions measured with HADES — •Marvin Nabroth for the HADES collaboration — Goethe-Universität Frankfurt, Frankfurt, Germany
Relativistic heavy-ion collisions provide an experimental tool to generate strongly interacting matter that exhibits extreme densities and high temperatures. With the HADES (High-Acceptance-Dielectron-Spectrometer) experiment the emission of several particle species including di-leptons, originated from a heavy-ion collisions are probed at SIS18 energies at a few GeV. Pions are, due their low mass, the most abundantly emitted mesons. Especially, charged pions can be easily detected by magnet-spectrometry. The resulting high statistics allow to precisely determine their production multiplicities as function of participants, to investigate the condition at the kinematic freeze-out as well as to examine anisotropies in the collective emission behaviour. The fact that the charged pion’s spectra are experimentally covered still with high abundance at low transverse momenta makes them a suitable probe for the investigation in regard of the Coulomb effect. Within the scope of this talk, we will discuss the recent published results on charged pions from Au+Au collisions at √sNN=2.4 GeV as well as the ongoing analyis regarding charged pions from Ag+Ag collisions at √sNN=2.55 GeV. Covered are the measured production rates, the results on directed, elliptic and triangular anisotropic flow and the determination of the Coulomb potential. This work has been supported by BMBF (05P19RFFCA), GSI and HIC for FAIR.