Comment 8 for bug 1468429

Hi Khaled,

> unsupported operand type(s) for ** or pow(): ‘AddVariable' and 'int'

This is probably something that you can handle by writing explicitly the product.
The square is sometimes difficult for the code since it needs to know on which index to contract.

> ALOHAERROR : Unable to deal with 4(or more) point interactions
> in presence of majorana particle/flow violation

This is the error I mentioned before that MG can not handle 4 fermion interaction with fermion flow violation.

Cheers,

Olivier

On 27 Jun 2015, at 18:16, Khaled Teilab <email address hidden> wrote:

> On 27.06.2015 18:37, Olivier Mattelaer wrote:
>> Hi,
>>
>> So in principle the fix that I mention should fix the problem.
>>
>> Cheers,
>>
>> Olivier
>>
> Hi Olivier,
>
> you mean the cmath functions? Unfortunately it doesn't :(
> However, now the error message has changed to:
>
> ALOHA: aloha creates FFS2 routines
> unsupported operand type(s) for ** or pow(): 'AddVariable' and 'int'
> Command "output" interrupted with error:
> ALOHAERROR : Unable to deal with 4(or more) point interactions
> in presence of majorana particle/flow violation
> Please report this bug on https://bugs.launchpad.net/madgraph5
>
> Greetings,
> Khaled
>
> --
> 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
>
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