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.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2013|
|Event||11th International Conference on Nucleus-Nucleus Collisions, NN 2012 - San Antonio, TX, United States|
Duration: 2012 May 27 → 2012 Jun 1
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)