Abstract
Dielectrons are ideal probes of the hot and dense medium created in relativistic heavy-ion collisions due to their minimal interactions with the partonic and hadronic medium. They carry the information from the initial to the final stage of a collision. We present the dielectron spectra in Au+Au collisions at sNN=27,54.4 and 200GeV measured with the STAR experiment. The large minimum bias datasets at sNN=27(54.4)GeV taken in 2017 (2018) significantly enhance the precision of the in-medium ρ modification measurement compared to previous STAR BES-I results. The Heavy Flavor Tracker (HFT) installed at STAR between 2014 and 2016 enables a better understanding of the semi-leptonic charm decay contributions by providing high-precision tracking and vertex information. Strategies to extract the dielectron spectra and suppress the charm component to the spectrum with the HFT in sNN=200GeV Au+Au collisions are discussed.
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