Code review comment for lp:~maddevelopers/mg5amcnlo/NLO_decay_process

Hi Olivier,

Thanks for trying it out!

Let me address your questions.

1). About the multi-particle warning, it should indeed not be raised. However, this is not specific to this branch, and I don't know how these multi-particles labels are defined. Maybe Marco can have a quick look to this?
I "fixed" the crash with a WARNING written to screen. Note that computing "t > b all all" does not make sense at all from a physics point of view because you are double counting many contributions (for example "t > b e+ ve" with "t > b wp g").

2). Remember that QCD NLO corrections can only be computed to processes that have at least one QCD particle in them. Therefore "w+ > all all" cannot be computed with the current code. This is not a limitation of this branch, but much more general. I don't think this branch is the right place to address this problem.

3). This was already exactly the way you want it to be. Note that the renormalisation scale dependence is simply rather small (your integration uncertainty is about 1% and the scale uncertainty is also about 1%).

4). I agree that this would be useful at some point. But I think first the above points 1) and 2) should be addressed before we could even start thinking about this.

Cheers,
Rik