Dielectron Production in C+C Collisions at 1 GeV/u and the Solution to the DLS Puzzle

Abstract

The production of e+e- pairs in C+C collisions at 1 GeV/u was investigated with the HADES experiment at GSI, Darmstadt. In the invariant-mass region $0.15GeV/c^2\le M_{ee}\le 0.5GeV/c^2$ the measured pair yield shows a strong excess above the contribution expected from hadron decays after freeze-out. The data are in good agreement with the results of the former DLS experiment for the same system and energy.

6 pages, 3 figures, conference proceedings: Quark Matter 2008, Jaipur (India), 4-10 February 2008, submitted to J. Phys. G: Nuclear and Particle Physics

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• System Size and Energy Dependence of Dilepton Production in Heavy-Ion Collisions at SIS Energies
• Di-Electrons from Resonances in Nucleon-Nucleon Collisions
• Dilepton production from SIS to LHC energies