K−/K+ratios in relativistic heavy-ion collisions

1998/04/07 by G. Q. Li, G. E. Brown · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1103/physrevc.58.1698

published as Phys.Rev.C58:1698-1705,1998 · RevTex, 10 pages, including 17 postscript figures, submitted to Phys. Rev. C

arxiv created 1998/04/07 · openalex publication_date 1998/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study K^\ensuremath-/K⁺ ratios as a function of centrality (participant nucleon number), transverse mass (m_t), and rapidity, in heavy-ion collisions at beam energies between 1 and 2 AGeV. We use the relativistic transport model that includes explicitly the strangeness degrees of freedom and consider two scenarios for kaon properties in dense matter, one with and one without medium modifications of their properties. In both scenarios, the K^\ensuremath-/K⁺ ratio does not change very much with the centrality, while the K/\ensuremathπ and K/\ensuremathπ ratios increase with increasing centrality. Significant differences are predicted, both in magnitudes and shapes, for the m_t spectra and rapidity distributions of K^\ensuremath-/K⁺ ratio. Experimental measurement of these ratios, currently under investigation by the FOPI, KaoS, E866, and E895 Collaborations, will be useful in revealing the kaon in-medium properties.

Cited by

• Open charm production in relativistic nucleus–nucleus collisions
• Correlation between the charged kaon ratio and the baryon phase-space density in heavy-ion collisions
• Partial wave contributions to the antikaon potential at finite momentum
• Production ofK+and ofK−mesons in heavy-ion collisions from 0.6Ato 2.0AGeV incident energy