Chiral symmetry and strangeness at SIS energies

✍ Scribed by Matthias F.M. Lutz

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 173 KB
• Volume: 53
• Category: Article
• ISSN: 0146-6410
• DOI: 10.1016/j.ppnp.2004.02.008

✦ Synopsis

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.