Studying Hadron Properties in Baryonic Matter with HADES.

Authors :: Kugler, A.
Balanda, A.
Belver, D.
Belyaev, A. V.
Blanco, A.
Böhmer, M.
Boyard, J. L.
Braun-Munzinger, P.
Cabanelas, P.
Castro, E.
Chernenko, S.
Díaz, J.
Dybczak, A.
Epple, E.
Fabbietti, L.
Fateev, O. V.
Finocchiaro, P.
Fonte, P.
Friese, J.
Fröhlich, I.
Source :: AIP Conference Proceedings; 8/5/2010, Vol. 1257 Issue 1, p691-694, 4p, 3 Graphs
Publication Year :: 2010
Abstract: The HADES spectrometer installed at GSI Darmstadt is a second generation experiment to study production of lepton pairs from proton, pion and nucleus induced reactions at the SIS/BEVALAC energy regime. The HADES study of the light C+C system at 1 and 2 AGeV confirms former finding of the DLS collaboration. Further studies of the reaction p+p and d+p allowed to reveal contribution to the above mentioned data of di-leptons produced during first chance collision. Finally, the results of the study of heavier system Ar+KCl indicates possible nonlinear dependence of the observed excess over the known long lived sources of di-leptons on the number of participants. [ABSTRACT FROM AUTHOR]