Dielectron Production in C+C Collisions at 2 AGeV with HADES Original Research Article

The HADES spectrometer is devoted to study production of di-electron pairs from proton, pion and nucleus induced reactions at 1−2 AGeV. The detector went into operational in 2002 and since then collected data from 12C +12C collisions at 2 AGeV (2002) and 1 AGeV (2004), 40Ar + KCl at 1.757 GeV (2005) and proton-proton reactions at 2.2 GeV (2004) and 1.25 GeV (2006). This paper focuses on the results obtained from 12C +12C collisions at 2 AGeV. Invariant mass corrected for reconstruction efficiencies will be shown and compared with calculations based on the thermal (PLUTO) and microscopic (HSD, RQMD, UrQMD) transport models.