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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Struktur und Dynamik von Kernen

HK 31.1: Gruppenbericht

Mittwoch, 19. März 2014, 16:30–17:00, HZ 4

Multi-Strangeness dynamics at PANDA — •Theodoros Gaitanos, Horst Lenske und Ulrich Mosel — Institut für Theoretische Physik, Universität Gießen

Multi-strange bound hadron systems are excellent candidates for studying in-medium hyperon-hyperon (YY) interactions. A better understanding of the strangeness sector of the hadronic equation of state is crucial for our understanding of astrophysical objects like neutron stars. Furthermore, these studies are being motivated by actual and planed experimental activities on hypernuclear physics (HypHI and PANDA Collaborations). In fact, HypHI has already studied single-strange hypernuclei in heavy-ion collisions, whereas studies on double- and multi-strange nuclear systems are being planed by PANDA. We have reported in the past first studies on single- and double-Λ hypernuclei production in reactions induced by heavy-ions and antiprotons, respectively. The YY-interaction is still little known and many controversial theoretical predictions exist in the literature. We therefore extend our previous works by investigating the influence of various hyperon-hyperon interactions on the production dynamics of multi-Λ hypernuclei in reactions relevant for FAIR. Particular attention is paid to the heavy Ω-baryon (S=−3) and its role to the formation of multi-Λ hypernuclei in reactions induced by antiprotons.
Work supported by DFG LE439/9-1 and BMBF 05P12RGFTE.