Example Selective Transport

This is a simulation example showing how to run simulation and selectively transport particles through the detector geometry according to configurable settings and how to use the external event trigger mechanism on generators.

The simulation uses Pythia8 pp generator with default settings. The specific settings of the simulation are defined in the sim.ini file.

Only the parameters for the selective particle transport are adjusted, namely

[Stack]
transportPrimary=external
transportPrimaryFileName=transportPDG.macro
transportPrimaryFuncName=transportPDG(321)
transportPrimaryInvert=false

transportPrimary defines the mode of selection, external means that the definition is loaded from a plugin macro defined by the function call transportPrimaryFuncName from the file transportPrimaryFileName. transportPrimaryInvert allows one to invert the definition, hence to inhibit transport for the selected particles.

The second step of this simulation examples shows how to continue the simulation from the first step and propagate all the remaining tracks. The process is done only for events that pass a specific trigger which requires that both photons from pi0 decay have converted within a given region.