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HK: Physik der Hadronen und Kerne

HK 16: Theory II

HK 16.6: Vortrag

Dienstag, 12. März 2002, 18:15–18:30, A

Kaons in nuclear matter — •Thomas Roth, Michael Buballa, and Jochen Wambach — Institut f. Kernphysik, TU Darmstadt

We investigate the modification of Kaons in isospin symmetric and non symmetric nuclear matter. Using the leading s-wave couplings of the SU(3) chiral meson-baryon Lagrangian we solve the coupled channel Kaon-nucleon scattering equation selfconsistently.

We obtain a description of the in medium properties of the Kaon-nucleon scattering amplitude dominated by the Λ(1405) resonance. The in-medium Kaon propagator is calculated for different densities and different proton-neutron mixtures.

While the Λ(1405) resonance is little affected by increasing density, we find that the Kaon mass experiences a strong downward shift. This will be important for the concept of Kaon condensation in neutron stars.