Eur. Phys. J. C (2007) 49: 261-267
https://doi.org/10.1140/epjc/s10052-006-0097-2

Regular Article – Experimental Physics

Di-electron production in C+C and p+p collisions with HADES

Physik Department E12, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany

^* e-mail: Thomas.Eberl@ph.tum.de

Received: 29 July 2006
Published online: 27 October 2006

Abstract

The High Acceptance Di-Electron Spectrometer HADES at GSI, Darmstadt, has been designed for systematic studies of hadron properties inside nuclear matter. First measured mass and momentum distributions of e⁺e^- pairs produced in ¹²C+¹²C collisions at 1 and 2 AGeV are presented and compared with p+p collisions at 2.2 GeV incident energy. The spectrometer set-up and the analysis methods are briefly outlined and a comparison of the data with Monte-Carlo events from a generator based on known production cross-sections and branching ratios is shown and discussed.