L\'evy analysis of HBT correlation functions in $\sqrt{s_{\mathrm{N}\mathrm{N}}}=$ 62 GeV and 39 GeV Au+Au collisions at PHENIX

The phase diagram of strongly interacting matter can be explored by analyzing data of heavy-ion collisions at different center of mass collision energies. For investigating the space-time structure of the hadron emission source, HBT correlation measurements are among the best tools. In this paper we present the latest results from the RHIC PHENIX experiment on such measurements in $\sqrt{s_{\mathrm{N}\mathrm{N}}}=$ 39 GeV and 62 GeV Au+Au collisions.