Occasional invalid color flow error in ssWW VBS
When simulating electroweak same-sign WW scattering at LO+PS Sherpa.yaml, I get an Invalid color flow
error for some random seeds I used (about 15 / 250 with 250k events each for a fully realistic run). Before the run crashes with the Invalid color flow
error, the following is printed in the log file:
Sudakov::Generate:
Parton [(0)], stat=0, kin=1, kscheme=0, col=0 : c : (56.5732585237,0.155013597706,-1.20583480859,56.542365649) 1.42 1.42 (0,0)
(Final state parton) Colour partners ((none),(none)), spectator = none
k_T start : 1.50597117192 k_T test : 0 k_T veto : 1.15792089237e+77 x_B : 1
fromdec : 0
.
I generate the debugging output starting from the event before the problematic one logfile.gz with the status directory Status_Path.tar.gz.