Correlation between the charged kaon ratio and the baryon phase-space density in heavy-ion collisions

Abstract

It is found that the baryon phase-space density obtained from the ratio of deuteron to proton yields is nearly constant over centrality in Au+Au collisions at the AGS. The finding offers an explanation for the puzzling centrality independence of the ratio of charged kaon total yields. The correlation between the charged kaon ratio and the average baryon phase-space density is studied for central heavy-ion collisions of various systems over a wide range of beam energy. It is found that the charged kaon ratio and the average baryon phase-space density both increase with decreasing beam energy, and are strongly correlated. Such study may provide a new approach to search for medium effect on the kaon mass.

5 pages, 3 figures, 1 table in revtex style

References in corpus (6)

• Medium Effects in Kaon and Antikaon Production in Nuclear Collisions at Subthreshold Beam Energies
• Medium Modified Cross Sections, Temperature and Finite Momentum Effects for Antikaon Production in Heavy-Ion Collisions
• Centrality Dependence of Kaon Yields in Si+A and Au+Au Collisions at Relativistic Energies
• Quark liberation and coalescence at CERN SPS
• Systematic Study of the Kaon to Pion Multiplicity Ratios in Heavy-Ion Collisions
• Baryon phase-space density in heavy-ion collisions

Cited by in corpus (5)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Kaon Production and Kaon to Pion Ratio in Au+Au Collisions at $\snn=130$ GeV
• Pion, kaon, and (anti-)proton production in U+U Collisions at $\sqrt{s_{NN}}$ = 193 GeV measured with the STAR detector
• Strangeness in dense nuclear matter: A review of AGS results
• Systematics of mid-rapidity K-/pi ratio in heavy-ion collisions