Chiral symmetry and strangeness at SIS energies

Details Chiral symmetry and strangeness at SIS energies Chiral symmetry and strangeness at SIS energies

2003-11-24

arxiv.org/abs/nucl-th/0311087v1

Prog.Part.Nucl.Phys.53:125-136,2004

Physics

Nuclear Physics

Nuclear Theory

10 pages, 2 figures, invited talk at Erice 2003

Scientific paper

10.1016/j.ppnp.2004.02.008

In this talk we review the consequences of the chiral SU(3) symmetry for strangeness propagation in nuclear matter. Objects of crucial importance are the meson-baryon scattering amplitudes obtained within the chiral coupled-channel effective field theory. Results for antikaon and hyperon-resonance spectral functions in cold nuclear matter are presented and discussed. The importance of the Sigma(1385) resonance for the subthreshold antikaon production in heavy-ion reaction at SIS is pointed out. The in-medium properties of the latter together with an antikaon spectral function based on chiral SU(3) dynamics suggest a significant enhancement of the pi \Lambda -> bar K N reaction in nuclear matter.

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