CERES / NA 45 Report to Cogne 1995

Recent Results Fromthe Ceres / Na 45 Experiment Andupgrade with a Radial - Drift

The CERES/NA45 experiment measures low mass electron pair production in Pb-Au collisions at 158AGeV at the CERN SPS. In this paper, we present the electron pair enhancement in the mass range 0:2 < mee < 0:7 GeV/c 2 , it increases more than linear with charged multiplicity and is most pronounced at low pair pT < 0:5 GeV/c. Transverse mass and rapidity distributions for charged hadrons h + ? h ? ...

Nature, formation, and distribution of carbonates on Ceres

Different carbonates have been detected on Ceres, and their abundance and spatial distribution have been mapped using a visible and infrared mapping spectrometer (VIR), the Dawn imaging spectrometer. Carbonates are abundant and ubiquitous across the surface, but variations in the strength and position of infrared spectral absorptions indicate variations in the composition and amount of these mi...

Ceres/na45 Status Report

Mineralogical mapping of Coniraya quadrangle of the dwarf planet Ceres

Ceres has been explored by NASA/Dawn spacecraft, which allowed for the discovery of the main mineralogical and compositional characteristics of Ceres’ surface. Here, we use mainly data from the Visible and InfraRed imaging spectrometer (VIR) in order to investigate the main spectral characteristics of the quadrangle Ac-H-2 Coniraya, one of the 15 quads in which Ceres’ surface has been divided. ...

Enhancement of low-mass dileptons in heavy ion collisions.

Using a relativistic transport model for the expansion stage of S+Au collisions at 200 GeV/nucleon, we show that the recently observed enhancement of low-mass dileptons by the CERES collaboration can be explained by the decrease of vector meson masses in hot and dense hadronic matter.