arXiv:nucl-th/9307008·v1·Nuclear Theory
Pion-nucleus reactions in a microscopic transport model
A. Engel · W. Cassing · U. Mosel · M. Schäfer · Gy. Wolf · (Institut für Theoretische Physik, Universität Giessen D--35392 Giessen, Germany)
Abstract
We analyse pion-nucleus reactions in a microscopic transport model of the BUU type, which propagates nucleons, pions, deltas and N(1440)-resonances explicitly in space and time. In particular we examine pion absorption and inelastic scattering cross sections for pion kinetic energies T(pi) =85-315MeV and various target masses. In general, the mass-dependence of the experimental data is well described for energies up to the delta-resonance (\approx 160 MeV) while the absorption cross sections are somewhat overestimated for the higher energies. In addition we study the possible dynamical effects of delta- and pion-potentials in the medium on various observables as well as alternative models for the in-medium delta-width.
Comments: 31 pages, UGI-93-04