Speaker
Description
The fireball produced in a relativistic heavy-ion collision has a net
positive electric charge, due to the protons from both the target and the
projectile nuclei, that affects the charged particles ejected from the expanding fireball. The effect of these long-range Coulomb interactions on the charged pion
momentum distributions, as well as on pion-pion momentum correlations (HBT), has been measured by the HADES collaboration in Au+Au and Ag+Ag collisions at a few-GeV centre-of-mass energies. Indeed, the study of Coulomb effects has the potential to reveal information about the properties of the pion source at freeze-out.
In our contribution, we will present results on the extraction of the Coulomb potential energy, the resulting source radii, and the corresponding freeze-out baryon density.
