Abstract
The HADES experiment, installed at GSI, Darmstadt, measures di-electron production in A + A, p/π + N and p/π + A collisions. Here, the π0 and η Dalitz decays have been reconstruced in the exclusive p + p reaction at 2.2 GeV to form a reference cocktail for long-lived di-electron sources. In the C+C reaction at 1 and 2 GeV/u, these long-lived sources have been subtracted from the measured inclusive e+e - yield to exhibit the signal from the early phase of the collision. The results suggest that resonances play an important role in dense nuclear matter.
Original language | English |
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Pages (from-to) | 317-326 |
Number of pages | 10 |
Journal | International Journal of Modern Physics A |
Volume | 24 |
Issue number | 2-3 |
DOIs | |
State | Published - 30 Jan 2009 |
Keywords
- Dense matter
- Di-electrons
- Mesons
- Resonances