Dielectron measurements with the HADES at GSI

In this work we present the dielectron analysis of 4.5 billion Ag+Ag collisions ((0−40)% centrality) at a center-of-mass energy √ s NN = 2.55 GeV measured with HADES. The obtained signal spectrum is compared to simulated hadronic cocktail and nucleon-nucleon reference spectra revealing strong contribution from hot dense phases. average temperature collision system can be extracted slope in-medium contribution. momentum differential observe modifications shape in ω−ρ invariant mass region. Furthermore compare results previous measurements Au+Au slightly lower energy. suggested ρ spectral function further studied within HADES pion-beam program. Here, recently published on electromagnetic coupling baryonic resonances − N final state.