Tübingen 2003 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 5: Theorie I
HK 5.7: Vortrag
Montag, 17. März 2003, 18:00–18:15, D
Strangeness in cold nuclear matter — •M.F.M. Lutz1, E.E. Kolomeitsev2, and C.L. Korpa3 — 1GSI, Planckstr. 1, D-64291 Darmstadt — 2NBI, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen — 3Department of Theoretical Physics, University of Pecs, Ifjusag, 7624 Pecs, Hungary
Based on a chiral SU(3) description of the kaon, antikaon and pion-nucleon scattering data [1] a self-consistent many-body approach for the propagation of hyperon-resonances and antikaons in cold nuclear matter is presented [2]. The importance of p-wave channels, in particular the contribution of the Sigma(1385) resonance, for the nuclear strangeness dynamics is emphasized. As a result of our simulations we predict substantially in-medium enhanced π Y to K N reaction amplitudes that should drive the subthreshold antikaon production in heavy-ion collisions at SIS energies strongly towards equilibrium conditions. As a further application of the obtained antikaon spectral function we report on a detailed calculation of the φ -meson properties in nuclear matter. Medium modifications of the vector meson spectral functions may be seen with the HADES detector at GSI in π A collisions.
[1] M.F.M. Lutz, E.E. Kolomeitsev, Nucl. Phys. A 700 (2002) 193
[2] M.F.M. Lutz, C.L. Korpa, Nucl. Phys. A 700 (2002) 309