  Transport simulations including in-medium properties derived in a microscopic
pi + nucleon-hole + delta-hole model in infinite nuclear matter are presented.
In-medium pion dispersion relations, partial delta decay widths, pion
absorption cross sections and delta cross sections are incorporated into the
transport description by means of a local-density approximation. Strong
modifications of pi and delta production and absorption rates are found, but
only small effects on pion observables.

Nuclear Theory