Comment 6 for bug 1468429

Hi,

So in principle the fix that I mention should fix the problem.

Cheers,

Olivier

On 27 Jun 2015, at 17:00, Khaled Teilab <email address hidden> wrote:

> Hello Olivier,
> actually -apart from the form factor- both models are exactly the same
> ...and... for the same process model1 produces very reasonable results !!!
> MG only fails to calculate the process when form factors are included.
> Cheers,
> Khaled
>
> On 27.06.2015 16:59, Olivier Mattelaer wrote:
>> Dear Khaled,
>>
>> I have not try model1 so i can not comment on it.
>> When I ran model3 after the modification that I mention before. MG refuses to make the computation for the process that you mention
>> because it can not handle it. This is process specific, so it is possible that you test for another process, I do not know but if they are indeed the same model then I would expect both to fail.
>>
>> Cheers,
>>
>> Olivier
>>
>>
>>
>
> --
> You received this bug notification because you are subscribed to
> MadGraph5_aMC@NLO.
> https://bugs.launchpad.net/bugs/1468429
>
> Title:
> Form factors with transposed spinors bug
>
> Status in MadGraph5_aMC@NLO Generator:
> Won't Fix
>
> Bug description:
> Hi,
> I try to include a form factor in a model having two scalar particles (sig, phi) and two fermions (f1 and f2).
> The lagrangian used in feynrules looks like:
> g_1 Inner[Dot,Inner[Dot,{f1bar,f2bar },sig IdentityMatrix[2]],{f1,f2 }] + I g_2 (phi(CC[f1bar].Ga[5].f1) + anti[phi](f1bar.Ga[5].CC[f1]))
>
> In the attachment you find four models:
> 1) Model1: Includes ALL vertices coming from the above Lagrangian WITHOUT form factor => WORKS
> 2) Model4: Includes ONLY vertices involving the sig particle WITH form factor => WORKS
> 3) Model2: Includes ALL vertices coming from the above Lagrangian WITH form factor on ALL vertices => FAILS to produce output folder
> 4) Model3: Includes ALL vertices coming from the above Lagrangian WITH form factor on ONLY vertices involving the sig particle => FAILS to poruce output folder
>
> The output looks like:
>
> INFO: initialize a new directory: model3test
> INFO: remove old information in model3test
> INFO: Organizing processes into subprocess groups
> INFO: Generating Helas calls for process: f1+ f1+ > f1+ f1+ WEIGHTED=2
> INFO: Processing color information for process: f1+ f1+ > f1+ f1+
> INFO: Creating files in directory P0_f1pf1p_f1pf1p
> INFO: Generating Feynman diagrams for Process: f1+ f1+ > f1+ f1+ WEIGHTED=2
> INFO: Finding symmetric diagrams for subprocess group f1pf1p_f1pf1p
> History written to /home/teilab/mg/model3test/Cards/proc_card_mg5.dat
> Generated helas calls for 1 subprocesses (3 diagrams) in 0.011 s
> Wrote files for 12 helas calls in 0.154 s
> Export UFO model to MG4 format
> CRITICAL: aS not define as external parameter adding it!
> WARNING: aEWM1 and Gf not define in MODEL. AQED will not be written correcty in LHE FILE
> ALOHA: aloha creates FFS2 routines
> Command "output model3test" interrupted with error:
> NameError : name 'exp' is not defined
> Please report this bug on https://bugs.launchpad.net/madgraph5
> More information is found in 'MG5_debug'.
> Please attach this file to your report.
>
> Could you please have a look at the attached models and tell me what
> the problem is? The debug file is also attached
>
> Thanks,
> Khaled
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mg5amcnlo/+bug/1468429/+subscriptions