selecting anomalous triple coupling of aa>ww in EWdim6 model

Asked by Mamutjan

hello,

I wanted to study how much anomalous-triple-coupling contributes to aa>ww cross section in EWdim6 model.

In madgraph, after importing the EWdim6 model, I used the command
generate a a > w+ w- /h

and 5 diagrams were produced, 4 of which were anomalous-triple-coupling, 1 was anomalous-quartic-coupling.

When I used
generate a a > w+ w- /h w+ w-
only 1 graphic (anomalous-quartic-coupling) was generated. And this is the graphic I wanted to exclude from the above 5.

How can I achieve it?

Regards,
Mamutjan

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Olivier Mattelaer
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Olivier Mattelaer (olivier-mattelaer) said :
#1

Hi,

What do you want to do exactly. Since the important contribution for those operator are the interference, it does not make sense to remove the diagram that you point.

Typically for this model/process the correct syntax is
> generate a a > w+ w- /h NP^2<=1
(SM+interference)
or
> generate a a > w+ w- /h NP^2==1
(interference only)

Cheers,

Olivier

On 15 Mar 2015, at 11:46, Mamutjan <email address hidden> wrote:

> New question #263674 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/263674
>
> hello,
>
> I wanted to study how much anomalous-triple-coupling contributes to aa>ww cross section in EWdim6 model.
>
> In madgraph, after importing the EWdim6 model, I used the command
> generate a a > w+ w- /h
>
> and 5 diagrams were produced, 4 of which were anomalous-triple-coupling, 1 was anomalous-quartic-coupling.
>
> When I used
> generate a a > w+ w- /h w+ w-
> only 1 graphic (anomalous-quartic-coupling) was generated. And this is the graphic I wanted to exclude from the above 5.
>
> How can I achieve it?
>
> Regards,
> Mamutjan
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Mamutjan (mamutjan) said :
#2

Dear Olivier,
I wanted to reproduce Figure 7 of paper 0912.5161v1.

Thank you for your time.
Regards,
Mamutjan.

At 2015-03-15 23:06:53, "Olivier Mattelaer" <email address hidden> wrote:
>Your question #263674 on MadGraph5_aMC@NLO changed:
>https://answers.launchpad.net/mg5amcnlo/+question/263674
>
> Status: Open => Answered
>
>Olivier Mattelaer proposed the following answer:
>Hi,
>
>What do you want to do exactly. Since the important contribution for
>those operator are the interference, it does not make sense to remove
>the diagram that you point.
>
>Typically for this model/process the correct syntax is
>> generate a a > w+ w- /h NP^2<=1
>(SM+interference)
>or
>> generate a a > w+ w- /h NP^2==1
>(interference only)
>
>Cheers,
>
>Olivier
>
>
>
>On 15 Mar 2015, at 11:46, Mamutjan <email address hidden> wrote:
>
>> New question #263674 on MadGraph5_aMC@NLO:
>> https://answers.launchpad.net/mg5amcnlo/+question/263674
>>
>> hello,
>>
>> I wanted to study how much anomalous-triple-coupling contributes to aa>ww cross section in EWdim6 model.
>>
>> In madgraph, after importing the EWdim6 model, I used the command
>> generate a a > w+ w- /h
>>
>> and 5 diagrams were produced, 4 of which were anomalous-triple-coupling, 1 was anomalous-quartic-coupling.
>>
>> When I used
>> generate a a > w+ w- /h w+ w-
>> only 1 graphic (anomalous-quartic-coupling) was generated. And this is the graphic I wanted to exclude from the above 5.
>>
>> How can I achieve it?
>>
>> Regards,
>> Mamutjan
>>
>> --
>> 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/263674/+confirm?answer_id=0
>
>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/263674
>
>You received this question notification because you asked the question.

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#3

So that is what I said, you need to keep the SM diagram into the computation.

Cheers,

Olivier
On 15 Mar 2015, at 23:31, Mamutjan <email address hidden> wrote:

> Question #263674 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/263674
>
> Status: Answered => Open
>
> Mamutjan is still having a problem:
> Dear Olivier,
> I wanted to reproduce Figure 7 of paper 0912.5161v1.
>
> Thank you for your time.
> Regards,
> Mamutjan.
>
>
>
>
>
> At 2015-03-15 23:06:53, "Olivier Mattelaer" <email address hidden> wrote:
>> Your question #263674 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/263674
>>
>> Status: Open => Answered
>>
>> Olivier Mattelaer proposed the following answer:
>> Hi,
>>
>> What do you want to do exactly. Since the important contribution for
>> those operator are the interference, it does not make sense to remove
>> the diagram that you point.
>>
>> Typically for this model/process the correct syntax is
>>> generate a a > w+ w- /h NP^2<=1
>> (SM+interference)
>> or
>>> generate a a > w+ w- /h NP^2==1
>> (interference only)
>>
>> Cheers,
>>
>> Olivier
>>
>>
>>
>> On 15 Mar 2015, at 11:46, Mamutjan <email address hidden> wrote:
>>
>>> New question #263674 on MadGraph5_aMC@NLO:
>>> https://answers.launchpad.net/mg5amcnlo/+question/263674
>>>
>>> hello,
>>>
>>> I wanted to study how much anomalous-triple-coupling contributes to aa>ww cross section in EWdim6 model.
>>>
>>> In madgraph, after importing the EWdim6 model, I used the command
>>> generate a a > w+ w- /h
>>>
>>> and 5 diagrams were produced, 4 of which were anomalous-triple-coupling, 1 was anomalous-quartic-coupling.
>>>
>>> When I used
>>> generate a a > w+ w- /h w+ w-
>>> only 1 graphic (anomalous-quartic-coupling) was generated. And this is the graphic I wanted to exclude from the above 5.
>>>
>>> How can I achieve it?
>>>
>>> Regards,
>>> Mamutjan
>>>
>>> --
>>> 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/263674/+confirm?answer_id=0
>>
>> 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/263674
>>
>> 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.

Revision history for this message
Mamutjan (mamutjan) said :
#4

Now I see your point.

But when I tried

generate a a > w+ w- /h NP^2<=1
I got three diagrams with no anomalous couplings, and the cross section is not increased(I set dim6 operators in param.card).

At 2015-03-16 08:42:01, "Olivier Mattelaer" <email address hidden> wrote:
>Your question #263674 on MadGraph5_aMC@NLO changed:
>https://answers.launchpad.net/mg5amcnlo/+question/263674
>
> Status: Open => Answered
>
>Olivier Mattelaer proposed the following answer:
>So that is what I said, you need to keep the SM diagram into the
>computation.
>
>Cheers,
>
>Olivier
>On 15 Mar 2015, at 23:31, Mamutjan <email address hidden> wrote:
>
>> Question #263674 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/263674
>>
>> Status: Answered => Open
>>
>> Mamutjan is still having a problem:
>> Dear Olivier,
>> I wanted to reproduce Figure 7 of paper 0912.5161v1.
>>
>> Thank you for your time.
>> Regards,
>> Mamutjan.
>>
>>
>>
>>
>>
>> At 2015-03-15 23:06:53, "Olivier Mattelaer" <email address hidden> wrote:
>>> Your question #263674 on MadGraph5_aMC@NLO changed:
>>> https://answers.launchpad.net/mg5amcnlo/+question/263674
>>>
>>> Status: Open => Answered
>>>
>>> Olivier Mattelaer proposed the following answer:
>>> Hi,
>>>
>>> What do you want to do exactly. Since the important contribution for
>>> those operator are the interference, it does not make sense to remove
>>> the diagram that you point.
>>>
>>> Typically for this model/process the correct syntax is
>>>> generate a a > w+ w- /h NP^2<=1
>>> (SM+interference)
>>> or
>>>> generate a a > w+ w- /h NP^2==1
>>> (interference only)
>>>
>>> Cheers,
>>>
>>> Olivier
>>>
>>>
>>>
>>> On 15 Mar 2015, at 11:46, Mamutjan <email address hidden> wrote:
>>>
>>>> New question #263674 on MadGraph5_aMC@NLO:
>>>> https://answers.launchpad.net/mg5amcnlo/+question/263674
>>>>
>>>> hello,
>>>>
>>>> I wanted to study how much anomalous-triple-coupling contributes to aa>ww cross section in EWdim6 model.
>>>>
>>>> In madgraph, after importing the EWdim6 model, I used the command
>>>> generate a a > w+ w- /h
>>>>
>>>> and 5 diagrams were produced, 4 of which were anomalous-triple-coupling, 1 was anomalous-quartic-coupling.
>>>>
>>>> When I used
>>>> generate a a > w+ w- /h w+ w-
>>>> only 1 graphic (anomalous-quartic-coupling) was generated. And this is the graphic I wanted to exclude from the above 5.
>>>>
>>>> How can I achieve it?
>>>>
>>>> Regards,
>>>> Mamutjan
>>>>
>>>> --
>>>> 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/263674/+confirm?answer_id=0
>>>
>>> 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/263674
>>>
>>> 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.
>
>--
>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/263674/+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/263674
>
>You received this question notification because you asked the question.

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#5

You also get the diagram with the anomalous couplings right?

Olivier

Revision history for this message
Mamutjan (mamutjan) said :
#6

No.
For syntax :

generate a a > w+ w- /h NP^2<=1
There are three diagrams , and they are all SM diagrams. After I let that process run,I got the same cross section as SM process.
I don't know how can i include both SM and triple anomalous couplings (for aa>ww) with no quartic ones.

At 2015-03-16 18:46:39, "Olivier Mattelaer" <email address hidden> wrote:
>Your question #263674 on MadGraph5_aMC@NLO changed:
>https://answers.launchpad.net/mg5amcnlo/+question/263674
>
> Status: Open => Needs information
>
>Olivier Mattelaer requested more information:
>You also get the diagram with the anomalous couplings right?
>
>Olivier
>
>--
>To answer this request for more information, you can either reply to
>this email or enter your reply at the following page:
>https://answers.launchpad.net/mg5amcnlo/+question/263674
>
>You received this question notification because you asked the question.

Revision history for this message
Mamutjan (mamutjan) said :
#7

It seems the follwing syntax would result in sm triple and quartic coupling diagrams .
>>generate a a > w+ w- /h NP=2

Revision history for this message
Mamutjan (mamutjan) said :
#8

I mean:
For
>>generate a a > w+ w- /h NP=2
I get
sm + anomalous triple + anomalous quartic diagrams.
I wanted sm+triple ones.

Revision history for this message
Best Olivier Mattelaer (olivier-mattelaer) said :
#9

That's True that for NP, it counts the power in the new physics scale.

So what you need is (for SM+interference):
generate a a > w+ w- /h NP^2<=2

generate a a > w+ w- /h NP=2
keeps you also the NP diagram square with itself which is equivalent to a dim8 contribution.

>sm + anomalous triple + anomalous quartic diagrams.
> I wanted sm+triple ones.

This you can not do, since this will break gauge invariance.

Cheers,

Olivier

Revision history for this message
Mamutjan (mamutjan) said :
#11

Can I do that by creating a model include only anomalous triple coupling with Feynrulse?

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#12

Hi,

Yes it is possible but this is a very bad idea.
Those 4 point interaction should be present for the preserving gauge theory.
Preserving gauge theory is also helping with unitary constraint.
The model that you have in mind is the way physics was done before the discovery of the Z and the W and should not be use anymore.
Please read arXiv:1205.4231 for full detail comparaison/link between the two description.

Cheers,

Olivier

On 16 Mar 2015, at 22:11, Mamutjan <email address hidden> wrote:

> Question #263674 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/263674
>
> Mamutjan posted a new comment:
> Can I do that by creating a model include only anomalous triple coupling
> with Feynrulse?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Mamutjan (mamutjan) said :
#13

Thank you very much !