Three-body collisions in Boltzmann-Uehling-Uhlenbeck theory

Details Three-body collisions in Boltzmann-Uehling-Uhlenbeck theory Three-body collisions in Boltzmann-Uehling-Uhlenbeck theory

2007-04-13

arxiv.org/abs/0704.1785v2

Phys.Rev.C76:044909,2007

Physics

Nuclear Physics

Nuclear Theory

26 pages, 9 figures, figures added, discussion extended, results not changed, version accepted in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.76.044909

Aiming at a microscopic description of heavy ion collisions in the beam energy region of about 10 A GeV, we extend the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model by including a relativistic mean field, in-medium baryon-baryon cross sections and three-body collisions. The model is then compared with experimental data for central Au+Au collisions at 2-10 A GeV and central Pb+Pb collisions at 30 and 40 A GeV on the proton rapidity spectra, the midrapidity yields of $\pi^+$, $K^\pm$ and $(\Lambda+\Sigma^0)$, and the transverse mass spectra of $\pi^\pm$ and $K^\pm$. The three-body collisions increase the inverse slope parameters of the hadron $m_\perp$-spectra to a good agreement with the data.

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