Chiral symmetry and strangeness at SIS energies

In this paper 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...

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Bibliographic Details
Published in:Progress in Particle and Nuclear Physics 2004-01, Vol.53 (1), p.125-136
Main Author: F.M. Lutz, Matthias
Format: Article
Language:English
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Summary:In this paper 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 Σ (1385) resonance for the subthreshold antikaon production in the 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 πΛ→ K ̄ N reaction in nuclear matter.
ISSN:0146-6410
1873-2224
DOI:10.1016/j.ppnp.2004.02.008