Strangeness production in heavy ion reactions at intermediate energies

Abstract

Kaon production, in particular $K^{+}$ production in heavy ion collisions at intermediate energies is discussed. Main emphasis is put on the question if subthreshold $K^{+}$ production can serve as a suitable tool to test the high density phase of such reactions and to deliver information on the high density behavior of the nuclear equation of state. It is shown that the $K^{+}$ excitation function in heavy ($Au+Au$) over light ($C+C$) systems provides a robust observable which, by comparison to data, strongly favors a soft equation of state. A second question of interest is the existence of an in-medium kaon potential as predicted by effective chiral Lagrangiens. Here it is argued that transport calculations support this scenario with, in the meantime, a significant level of consistency.

Invited talk at the International School of Nuclear Physics, ''Heavy Ion Reactions from Nuclear to Quark Matter'', Erice (It), Sep. 16 - 24, 2003 (typos corrected in v2)

References in corpus (8)

• Determination of the Equation of State of Dense Matter
• Antikaon production in A+A collisions at SIS energies within an off-shell G-matrix approach
• Directed flow in Au+Au, Xe+CsI and Ni+Ni collisions and the nuclear equation of state
• Self consistent propagation of hyperons and antikaons in nuclear matter based on relativistic chiral SU(3) dynamics
• Differential directed flow in Au+Au collisions
• Nuclear Many-Body Dynamics constrained by QCD and Chiral Symmetry
• Evidence of kaon nuclear and Coulomb potential effects on soft K+ production from nuclei
• $K^{-}/K^{+}$ ratio in heavy-ion collisions at GSI with an antikaon self-energy in hot and dense matter

Cited by in corpus (11)

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• Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
• ${\Sigma }^{-}/{\Sigma }^{+}$ ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities
• Kaons and antikaons in asymmetric nuclear matter
• Lambda hyperon production and polarization in collisions of p(3.5 GeV) + Nb
• K${}^{-}$ multi-nucleon absorption cross sections and branching ratios in $\Lambda$p and ${\Sigma }^0$p final states
• Quarkyonic matter and quarkyonic stars in an extended RMF model
• Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Nucleonic models
• Complete Strangeness Measurements in Heavy-Ion Collisions
• Bayesian inference of nuclear incompressibility from collective flow in mid-central Au+Au collisions at 400--1500 MeV/nucleon
• Toward a Unified Understanding of the Dense Matter Equation of State