Cascade production in heavy-ion collisions at SIS energies

Details Cascade production in heavy-ion collisions at SIS energies Cascade production in heavy-ion collisions at SIS energies

2003-12-02

arxiv.org/abs/nucl-th/0312009v2

Phys.Lett. B584 (2004) 269-275

Physics

Nuclear Physics

Nuclear Theory

13 pages, 5 figures, typos fixed and discussions added, to appear in PLB

Scientific paper

10.1016/j.physletb.2004.01.055

Production of the doubly strange $\Xi $ baryon in heavy-ion collisions at \textrm{SIS} energies is studied in a relativistic transport model that includes perturbatively the strangeness-exchange reactions $\bar{K}\Lambda \to \pi \Xi $ and $\bar{K}\Sigma \to \pi \Xi $. Taking the cross sections for these reactions from the predictions of a hadronic model, we find that the $\Xi $ yield is about $10^{-4}$ in central collisions of $% ^{58}$Ni + $^{58}$Ni at $E/A=1.93$ \textrm{GeV}. The $\Xi $ yield is further found to be more sensitive to the magnitude of the cross sections for strangeness-exchange reactions than to the medium effects due to modified kaon properties. We have also made predictions for $\Xi $ production in Au+Au collisions at energies from 1 to 2 GeV/nucleon.

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