Speaker
Timo Scheib
Description
In Au+Au collisions at $1.23 A$ $GeV$ incident energy all particles carrying strangeness are produced below their respective free nucleon-nucleon threshold. As a consequence, the production cross section is very sensitive to medium effects like momentum distributions, two- or multi-step collisions and modification of the in-medium spectral distribution of the produced states. For the first time at such low energies, $K^{0}_{S}$ mesons and $\Lambda$ hyperons have been reconstructed.
In total 7.3 Billion of the $40\%$ most central Au($1.23$ GeV per nucleon)+Au collisions have been analyzed for this investigation. The data has been recorded with HADES and a substantially improved reconstruction method has been employed to reconstruct the hadrons with high purity in a wide phase space region. In this contribution we present differential, acceptance and efficiency corrected yields and comparisons of the preliminary results to transport models and SHM.
| On behalf of collaboration: | HADES |
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Author
Timo Scheib
