After offline discussions on skype with Marco, it turns out that the issue is related to the treatment of the fermion flow in the loops. Therefore, I assign this issue to you :-)
If you want to treat it faster, feel free to contact me on skype.
Cheers,
Benj
PS: I have tested both with a fresh and with the old UFO (from our common 2015 paper), and both with 2.6.8 (python2) and 2.8.1 (python3). The problem is the same.
Hi Valentin,
After offline discussions on skype with Marco, it turns out that the issue is related to the treatment of the fermion flow in the loops. Therefore, I assign this issue to you :-)
If you want to treat it faster, feel free to contact me on skype.
Cheers,
Benj
PS: I have tested both with a fresh and with the old UFO (from our common 2015 paper), and both with 2.6.8 (python2) and 2.8.1 (python3). The problem is the same.