Subthreshold cascade production in heavy ion collisions

Feng Li, Lie Wen Chen, Che Ming Ko, Su Houng Lee

Research output: Contribution to journalConference article

Abstract

Using a gauged avor SU(3)-invariant hadronic Lagrangian, we have calculated the cross sections for the strangeness-exchange reactions Y Y → NΞ (Y = λ,∑) in the Born approximation. These cross sections are then used in the Relativistic Vlasov-Uehling-Uhlenbeck (RVUU) transport model to study Ξ production in Ar+KCl collisions at incident energy of 1.76A GeV and impact parameter b = 3:5 fm. We find that including the contributions of hyperon-hyperon scattering channels strongly enhances the yield of Ξ, leading to the abundance ratio Ξ̄/(λ + ∑0) = 3:38 × 10-3, which is essentially consistent with the recently measured value of (5.6 ± 1.2+1.8 -1.7) × 10 -3 by the HADES collaboration at GSI.

Original languageEnglish
Article number012015
JournalJournal of Physics: Conference Series
Volume420
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1
Event11th International Conference on Nucleus-Nucleus Collisions, NN 2012 - San Antonio, TX, United States
Duration: 2012 May 272012 Jun 1

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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