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0001 # Define the decay of the J/psi particle
0002 # This sets a 100% branching ratio to e+ e− (electron-positron pair)
0003 # 'PHOTOS' enables QED final state radiation (e.g., soft photons from electrons)
0004 # 'VLL' is the decay model for a vector particle decaying leptonically
0005
0006 Decay J/psi
0007 1.000 e+ e- PHOTOS VLL;
0008 Enddecay
0009
0010 # End of decay file
0011 End
