generating events for fourth generation leptons

Hi Mai,

Do you have a model with the fourth generation leptons?
If not, the first step is to check if someone made such model public by looking here:
http://feynrules.irmp.ucl.ac.be/wiki/ModelDatabaseMainPage

After that, it is just a matter to know the name given by the model to this fourth generation lepton (let assumed that this is epsilon)
and then do
generate p p > epsilon epsilon~

Cheers,

Olivier

> On Jan 17, 2016, at 13:31, Mai <email address hidden> wrote:
>
> New question #281093 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/281093
>
> Hi,
>
> I want to generate fourth generation leptons , with PID code 17 but i failed to do so.
>
> The main issue here that i want to get MC files with different masses for monopole with PID code 4110000, but this will be add in the step, simulation, after generating events for fourth generation leptons.
>
> I tried to edit param_card.dat and proc_cards.dat but there is a missing step because i got LHE files with all the particles in the model (when i compare it to another LHE file made with pythia)
>
> could you please tell me in details what steps i should do and which exactly files i should edit to generate the events?. I tried to follow the tutorials and README files but i failed.
>
> thanks,
>
> Mai
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Hi Olivier,

What shall I do if I didn't find the particle with PID code 17 in the 4GEN model?

thanks,

Mai

Hi,

Looks like this model is four generation only in the quark sector.

The easiest is probably that you use FeynRules to create your model.
Passing from three generations to four based on the SM model of FR should be relatively easy.

Cheers,

Olivier

> On Jan 17, 2016, at 14:08, Mai <email address hidden> wrote:
>
> Question #281093 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/281093
>
> Status: Answered => Open
>
> Mai is still having a problem:
> Hi Olivier,
>
> What shall I do if I didn't find the particle with PID code 17 in the
> 4GEN model?
>
> thanks,
>
> Mai
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Dear Olivier,

I have found the model i want with the same particle , PDG and spin half. and i succeeded to generate events. but now i need the same model but with spin zero. In which file i should edit the spin to zero?. could you please send me a snap shot because i spent a lot of time trying to discover MG5 .

p.s. i have the model with spin zero but under MG4 , i tried to look in the web how to deal with MG4 but i couldn’t find any.

please help.

thanks,

Mai

On Jan 17, 2016, at 16:21, Olivier Mattelaer <email address hidden> wrote:

> Your question #281093 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/281093
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Hi,
>
> Looks like this model is four generation only in the quark sector.
>
> The easiest is probably that you use FeynRules to create your model.
> Passing from three generations to four based on the SM model of FR should be relatively easy.
>
> Cheers,
>
> Olivier
>
>> On Jan 17, 2016, at 14:08, Mai <email address hidden> wrote:
>>
>> Question #281093 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/281093
>>
>> Status: Answered => Open
>>
>> Mai is still having a problem:
>> Hi Olivier,
>>
>> What shall I do if I didn't find the particle with PID code 17 in the
>> 4GEN model?
>>
>> thanks,
>>
>> Mai
>>
>> --
>> You received this question notification because you are an answer
>> contact for MadGraph5_aMC@NLO.
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/mg5amcnlo/+question/281093/+confirm?answer_id=2
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/mg5amcnlo/+question/281093
>
> You received this question notification because you asked the question.

Hi,

Changing the spin in a UFO model is not trivial since you need to change all the interaction related to this particle by changing the lorentz structure associate to each interactions.

> p.s. i have the model with spin zero but under MG4 , i tried to look in
> the web how to deal with MG4 but i couldn’t find any.

Note that you can try to load your MG4 model in MG5 via the command
import model_v4 NAME
where NAME is the directory name under models/ which contains your model

Cheers,

Olivier

> On Jan 21, 2016, at 17:27, Mai <email address hidden> wrote:
>
> Question #281093 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/281093
>
> Status: Answered => Open
>
> Mai is still having a problem:
> Dear Olivier,
>
> I have found the model i want with the same particle , PDG and spin
> half. and i succeeded to generate events. but now i need the same model
> but with spin zero. In which file i should edit the spin to zero?. could
> you please send me a snap shot because i spent a lot of time trying to
> discover MG5 .
>
> p.s. i have the model with spin zero but under MG4 , i tried to look in
> the web how to deal with MG4 but i couldn’t find any.
>
> please help.
>
> thanks,
>
> Mai
>
>
> On Jan 17, 2016, at 16:21, Olivier Mattelaer <email address hidden> wrote:
>
>> Your question #281093 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/281093
>>
>> Status: Open => Answered
>>
>> Olivier Mattelaer proposed the following answer:
>> Hi,
>>
>> Looks like this model is four generation only in the quark sector.
>>
>> The easiest is probably that you use FeynRules to create your model.
>> Passing from three generations to four based on the SM model of FR should be relatively easy.
>>
>> Cheers,
>>
>> Olivier
>>
>>> On Jan 17, 2016, at 14:08, Mai <email address hidden> wrote:
>>>
>>> Question #281093 on MadGraph5_aMC@NLO changed:
>>> https://answers.launchpad.net/mg5amcnlo/+question/281093
>>>
>>> Status: Answered => Open
>>>
>>> Mai is still having a problem:
>>> Hi Olivier,
>>>
>>> What shall I do if I didn't find the particle with PID code 17 in the
>>> 4GEN model?
>>>
>>> thanks,
>>>
>>> Mai
>>>
>>> --
>>> You received this question notification because you are an answer
>>> contact for MadGraph5_aMC@NLO.
>>
>> --
>> If this answers your question, please go to the following page to let us
>> know that it is solved:
>> https://answers.launchpad.net/mg5amcnlo/+question/281093/+confirm?answer_id=2
>>
>> If you still need help, you can reply to this email or go to the
>> following page to enter your feedback:
>> https://answers.launchpad.net/mg5amcnlo/+question/281093
>>
>> You received this question notification because you asked the question.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Hi Olivier,

But I tried to work with this model under MG5 and i got an error in compilation: (i am sorry i am not an expert) I think i should change something from fortran to python.. i dont know.

here you are the error:

compile Source Directory
Error detected in "generate_events run_01"
write debug file /Users/maielsawy/Desktop/MONOPOLE_2015/MG5_aMC_v2_3_3/bin/Spin_zero_v2/run_01_tag_1_debug.log
If you need help with this issue please contact us on https://answers.launchpad.net/madgraph5
MadGraph5Error : A compilation Error occurs when trying to compile /Users/maielsawy/Desktop/MONOPOLE_2015/MG5_aMC_v2_3_3/bin/Spin_zero_v2/Source.
 The compilation fails with the following output message:
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -c -o combine_events.o combine_events.f
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -o ../bin/internal/combine_events combine_events.o rw_events.o ranmar.o kin_functions.o open_file.o rw_routines.o alfas_functions.o setrun.o -L../lib/ -lmodel -lpdf
     Undefined symbols for architecture x86_64:
       "_lh_readin_", referenced from:
           _setpara_ in libmodel.a(couplings.o)
     ld: symbol(s) not found for architecture x86_64
     collect2: error: ld returned 1 exit status
     make: *** [../bin/internal/combine_events] Error 1

 Please try to fix this compilations issue and retry.
 Help might be found at https://answers.launchpad.net/madgraph5.
 If you think that this is a bug, you can report this at https://bugs.launchpad.net/madgraph5
quit
INFO:

thanks,

Mai

Hi,

Looks like your V4 model is not complete since you miss the function lh_readin
which is typically part of the couplings.f file. This is the routine which reads the param_card
to assign the parameter to the fortran variable.

Cheers,

Olivier

> On Jan 22, 2016, at 09:08, Mai <email address hidden> wrote:
>
> Question #281093 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/281093
>
> Status: Answered => Open
>
> Mai is still having a problem:
> Hi Olivier,
>
> But I tried to work with this model under MG5 and i got an error in
> compilation: (i am sorry i am not an expert) I think i should change
> something from fortran to python.. i dont know.
>
> here you are the error:
>
> compile Source Directory
> Error detected in "generate_events run_01"
> write debug file /Users/maielsawy/Desktop/MONOPOLE_2015/MG5_aMC_v2_3_3/bin/Spin_zero_v2/run_01_tag_1_debug.log
> If you need help with this issue please contact us on https://answers.launchpad.net/madgraph5
> MadGraph5Error : A compilation Error occurs when trying to compile /Users/maielsawy/Desktop/MONOPOLE_2015/MG5_aMC_v2_3_3/bin/Spin_zero_v2/Source.
> The compilation fails with the following output message:
> gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -c -o combine_events.o combine_events.f
> gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -o ../bin/internal/combine_events combine_events.o rw_events.o ranmar.o kin_functions.o open_file.o rw_routines.o alfas_functions.o setrun.o -L../lib/ -lmodel -lpdf
> Undefined symbols for architecture x86_64:
> "_lh_readin_", referenced from:
> _setpara_ in libmodel.a(couplings.o)
> ld: symbol(s) not found for architecture x86_64
> collect2: error: ld returned 1 exit status
> make: *** [../bin/internal/combine_events] Error 1
>
> Please try to fix this compilations issue and retry.
> Help might be found at https://answers.launchpad.net/madgraph5.
> If you think that this is a bug, you can report this at https://bugs.launchpad.net/madgraph5
> quit
> INFO:
>
>
> thanks,
>
> Mai
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.