Anisotropy of subthreshold K+ emission in heavy ion reactions

Journal Publication ResearchOnline@JCU
Wang, Z.S.;Faessler, Amand;Fuchs, C.;Uma Maheswari, V.S.;Kosov, D.S.
Daniel Kosov
Abstract

The origin of the forward-backward enhancement of K⁺ emission observed in symmetric nucleus-nucleus collisions at 1 GeV/nucleon has been explored. The nonisotropic pion-baryon reaction leading to K⁺ production has been found to play a substantial role in creating the forward-backward peak of the kaon angular distribution. By an analysis including also the effects from relevant final-state interactions on kaons, we can reproduce the experimental kaon angular distribution. We argue that the observed nonisotropic kaon emission may provide a support to the pion-induced channel for subthreshold kaon production in heavy ion reactions.

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79

ISBN/ISSN

1079-7114

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Issue

21

Pages Count

4

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Publisher

American Physical Society

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DOI

10.1103/PhysRevLett.79.4096