Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 16: Heavy-Ion Collisions and QCD Phases III
HK 16.2: Vortrag
Dienstag, 11. März 2025, 14:15–14:30, HS 3 Chemie
Dielectron Analysis for the CBM Experiment in Au+Au Collisions at √sNN=3.19 GeV — •Luisa Faber for the CBM collaboration — Institut für Kernphysik Universität Münster
The Compressed Baryonic Matter (CBM) experiment is currently under construction in Darmstadt and designed to explore the QCD phase diagram at high net-baryon densities using heavy ion collisions with energies ranging from √sNN=2.86 GeV to √sNN=4.93 GeV and high interaction rates up to 10 MHz.
In different stages of the fireball evolution virtual photons are produced and able to leave the medium since they do not interact strongly, making them an important measurement tool. They carry the information with their invariant mass, which can be accessed by their decay into dileptons. The invariant mass spectrum allows for example to determine the temperature of the medium. By extracting this temperature at different collision energies one can access the caloric curve and possibly determine the order of the phase transition between the QGP and confined matter in this region of the phase diagram.
In this talk simulations with a kinetic energy of 3.56 AGeV for Au+Au collisions are used to extract the dielectron mass spectrum. Since dileptons are rare probes it is of utmost importance in this analysis to ensure a high electron efficiency and a high pion suppression. Prior work was carried out for the maximum energy of 11 AGeV. The used cuts on detector parameters are adapted for the lower energy. First results of the analysis are shown in this talk.
Keywords: Dielectron; Dilepton; Compressed Baryonic Matter; Quark Gluon Plasma