Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 73: Heavy Ion Collisions and QCD Phases 10

HK 73.5: Vortrag

Freitag, 27. März 2015, 16:00–16:15, T/HS2

Dilepton and pion production at SIS energies — •Janus Weil — Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, 60438 Frankfurt, Germany

We discuss dilepton and pion production at SIS energies in a transport approach, both of which are tightly connected to the dynamics of baryonic resonances. In heavy-ion collisions, resonance contributions are very hard to pin down, and it has been shown that a good baseline from elementary (pp) reactions is essential for a better understanding of the resonance cocktail and the involved electromagnetic couplings and for distinguishing pure vacuum effects from actual in-medium modifications. Recent pion-beam measurements at GSI will provide further constraints for many of the assumptions and parameters that enter transport simulations, in particular resonance properties and transition form factors. We try to to get a consistent picture of dilepton and pion production at SIS energies by considering leptonic and hadronic observables from both elementary and heavy-ion collisions.