...
PYTHIA is used for final state QED and QCD parton showering and for the fragmentation of quarks and gluons. The interface
Parton showering is done for all final state ferminons with the exception of electrons. Final state QED showering of electrons
is turned off because the PYTHIA final state showering code indiscriminately uses the invariant mass of final state fermion-antifermion pairs for the maximum virtuality scale.
The interface to PYTHIA is contained in ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/whizard-src/user.f90 . The source
code for referenced subroutines can be found in ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/a6f/include
.
Partons showering is done for all final state ferminons with the exception of electrons. Final state QED showering of electrons
is turned off because the PYTHIA final state showering code indiscriminately uses the invariant mass of final state fermion-antifermion pairs for the maximum virtuality scale Color flow information was not available in WHIZARD 1.40, and so an effort is made in subroutines such as ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/a6f/include/calc_a1sq_a2sq.f90 to identify color singlet systems
(see also ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/a6f/include/ilc_fragment_call.f90 ).
Kinematic Cuts
FAQ
Whizard has no gluon emission by default, leading to potentially incorrect multiplicity distributions.
...