Chiral symmetry and strangeness at SIS energies

2003/11/24 by Matthias F. M. Lutz, Matthias F.M. Lutz
Physics and Astronomy · #Amplitude #Chiral symmetry #High-Energy Particle Collisions Research #Nuclear matter #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #Scattering #Spectral function #Strangeness #Symmetry (geometry) #nucl-th

paper · pdf · doi:10.1016/j.ppnp.2004.02.008

published as Prog.Part.Nucl.Phys.53:125-136,2004 · 10 pages, 2 figures, invited talk at Erice 2003

arxiv created 2003/11/24 · openalex publication_date 2004/04/14 · arxiv updated 2010/12/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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 Λ-> bar K N reaction in nuclear matter.

Citations

• K−-proton scattering and the Λ (1405) in dense matter
• Hadron properties just before deconfinement
• Self-consistent propagation of hyperons and antikaons in nuclear matter based on relativistic chiral SU(3) dynamics
• K−/K+ratios in relativistic heavy-ion collisions
• Statistical model description of K+ and K− production between 1–10 A·GeV
• On meson resonances and chiral symmetry
• Relativistic chiral SU(3) symmetry, large-Nc sum rules and meson–baryon scattering