Physics Processes

In this section we enumerate the physics processes that are available in PYTHIA, introducing the ISUB code that can be used to select desired processes. A number of comments are made about the physics scenarios involved, with emphasis on the underlying assumptions and domain of validity. The section closes with a survey of interesting processes by machine. Note that ISUB is a dummy index introduced to allow simple referencing of processes. There are no global variables in PYTHIA named ISUB.