A fair fraction of all the processes in PYTHIA deal with Higgs
production in one form or another. This multiplication is caused by
the need to consider production by several different processes,
depending on Higgs mass and machine type. Further, the program
contains a full two-Higgs-multiplet scenario, as predicted for example
in the Minimal Supersymmetric extension of the Standard Model
(MSSM). Therefore the continued discussion is, somewhat arbitrarily,
subdivided into a few different scenarios. Doubly-charged Higgs
particles appear in left-right symmetric models, and are covered in
section
.