Dilepton measurements with HADES
Abstract
HADES is the only operating dielectron spectrometer in the energy regime 1-2 AGeV. The physics program aims at a systematic investigation of dielectron production in heavy ion as well as elementary and pion-induced reactions. This contribution highlights recent results on electron pair production in C12+C12 collisions at an incident energy of 2 AGeV with HADES. The measured pair production probabilities span over five orders of magnitude. Dalitz decays of pi0 and eta account for all the yield up to 0.15 GeV/c2, but for only about 50% above this invariant mass. The excess yield compared to the hadronic cocktail between the pi0-Dalitz and the rho/omega invariant-mass region is in agreement with the former DLS result if one assumes that it scales with beam energy like pion production. Preliminary results from C12+C12 collisions at an incident energy of 1 AGeV support this scenario.
Keywords
Cite
@article{arxiv.0710.3274,
title = {Dilepton measurements with HADES},
author = {C. Muentz},
journal= {arXiv preprint arXiv:0710.3274},
year = {2019}
}
Comments
6 pages, 3 figures, conference proceedings: Critical Point and Onset of Deconfinement - 4th International Workshop, July 9 - 13, 2007