PhokharaEvtgenDoubleCharmonium.py

#!/usr/bin/env python3
 
 
 
 
 
import basf2
import beamparameters
import generators
 
# Set the global log level.
basf2.set_log_level(basf2.LogLevel.INFO)
 
main = basf2.create_path()
 
main.add_module("EventInfoSetter", expList=0, runList=1, evtNumList=100)
 
# Beam parameters.
beamparameters.add_beamparameters(main, "Y4S")
 
# PHOKHARA and EvtGen.
decay_file = basf2.find_file('generators/examples/PhokharaEvtgenDoubleCharmonium.dec')
generators.add_phokhara_evtgen_combination(
    main, ['J/psi', 'eta_c'], decay_file, beam_energy_spread=True)
 
# Output.
output = basf2.register_module('RootOutput')
output.param('outputFileName', 'phokhara_evtgen_double_charmonium.root')
main.add_module(output)
 
# Print MC particles.
main.add_module('PrintMCParticles', logLevel=basf2.LogLevel.DEBUG, onlyPrimaries=False)
 
# Progress.
main.add_module('Progress')
 
# Generate events.
basf2.process(main)
 
# show call statistics
print(basf2.statistics)