Vector Boson Fusion

Asked by Kanhaiya Gupta

What is the MadGraph command to generate Higgs and Z boson by Vector boson fusion?

Thank you!

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Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#1

Hi,

I guess that what you are looking at is
generate p p > j j Z h QCD=0

But please check the Feynman Diagram to check if this is what you are looking for.

Cheers,

Olivier

Revision history for this message
Kanhaiya Gupta (kanhaiya11) said :
#2

I am writing like

p p > u d h and p p > u d z

I am getting the incorrect feynman diagram. w+ and w- should fuse to give h
and z but here it is either w- w- or w+ w+ which is not correct.

On Thu, Mar 14, 2019 at 12:47 AM Olivier Mattelaer <
<email address hidden>> wrote:

> Your question #679176 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/679176
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Hi,
>
> I guess that what you are looking at is
> generate p p > j j Z h QCD=0
>
> But please check the Feynman Diagram to check if this is what you are
> looking for.
>
> Cheers,
>
> Olivier
>
> --
> 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/679176/+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/679176
>
> You received this question notification because you asked the question.
>

Revision history for this message
Kanhaiya Gupta (kanhaiya11) said :
#3

Yes, still i cannot generate the process with correct Feynman diagram .

On Thu, Mar 14, 2019 at 12:55 AM Kanhaiya Gupta <email address hidden>
wrote:

> I am writing like
>
> p p > u d h and p p > u d z
>
> I am getting the incorrect feynman diagram. w+ and w- should fuse to give
> h and z but here it is either w- w- or w+ w+ which is not correct.
>
>
>
> On Thu, Mar 14, 2019 at 12:47 AM Olivier Mattelaer <
> <email address hidden>> wrote:
>
>> Your question #679176 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/679176
>>
>> Status: Open => Answered
>>
>> Olivier Mattelaer proposed the following answer:
>> Hi,
>>
>> I guess that what you are looking at is
>> generate p p > j j Z h QCD=0
>>
>> But please check the Feynman Diagram to check if this is what you are
>> looking for.
>>
>> Cheers,
>>
>> Olivier
>>
>> --
>> 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/679176/+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/679176
>>
>> You received this question notification because you asked the question.
>>
>

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#4

Did you tried:

p p > j j h QCD=0
p p > j j Z QCD=0

Cheers,

Olivier

> On 13 Mar 2019, at 20:32, Kanhaiya Gupta <email address hidden> wrote:
>
> Question #679176 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/679176
>
> Kanhaiya Gupta gave more information on the question:
> Yes, still i cannot generate the process with correct Feynman diagram .
>
> On Thu, Mar 14, 2019 at 12:55 AM Kanhaiya Gupta <email address hidden>
> wrote:
>
>> I am writing like
>>
>> p p > u d h and p p > u d z
>>
>> I am getting the incorrect feynman diagram. w+ and w- should fuse to give
>> h and z but here it is either w- w- or w+ w+ which is not correct.
>>
>>
>>
>> On Thu, Mar 14, 2019 at 12:47 AM Olivier Mattelaer <
>> <email address hidden>> wrote:
>>
>>> Your question #679176 on MadGraph5_aMC@NLO changed:
>>> https://answers.launchpad.net/mg5amcnlo/+question/679176
>>>
>>> Status: Open => Answered
>>>
>>> Olivier Mattelaer proposed the following answer:
>>> Hi,
>>>
>>> I guess that what you are looking at is
>>> generate p p > j j Z h QCD=0
>>>
>>> But please check the Feynman Diagram to check if this is what you are
>>> looking for.
>>>
>>> Cheers,
>>>
>>> Olivier
>>>
>>> --
>>> 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/679176/+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/679176
>>>
>>> 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
Kanhaiya Gupta (kanhaiya11) said :
#5

Yes, I generated the same. I cannot get W+ W- fusion to h and Z boson.
Instead it is either W+ W+ or W- W- fusion to higgs and z boson. I am
getting wrong Feynman diagram. Higgs production by fusion of Z Z boson is
okay.

still, the problem is not solved

On Thu, Mar 14, 2019 at 1:13 AM Olivier Mattelaer <
<email address hidden>> wrote:

> Your question #679176 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/679176
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Did you tried:
>
> p p > j j h QCD=0
> p p > j j Z QCD=0
>
> Cheers,
>
> Olivier
>
> > On 13 Mar 2019, at 20:32, Kanhaiya Gupta <
> <email address hidden>> wrote:
> >
> > Question #679176 on MadGraph5_aMC@NLO changed:
> > https://answers.launchpad.net/mg5amcnlo/+question/679176
> >
> > Kanhaiya Gupta gave more information on the question:
> > Yes, still i cannot generate the process with correct Feynman diagram .
> >
> > On Thu, Mar 14, 2019 at 12:55 AM Kanhaiya Gupta <
> <email address hidden>>
> > wrote:
> >
> >> I am writing like
> >>
> >> p p > u d h and p p > u d z
> >>
> >> I am getting the incorrect feynman diagram. w+ and w- should fuse to
> give
> >> h and z but here it is either w- w- or w+ w+ which is not correct.
> >>
> >>
> >>
> >> On Thu, Mar 14, 2019 at 12:47 AM Olivier Mattelaer <
> >> <email address hidden>> wrote:
> >>
> >>> Your question #679176 on MadGraph5_aMC@NLO changed:
> >>> https://answers.launchpad.net/mg5amcnlo/+question/679176
> >>>
> >>> Status: Open => Answered
> >>>
> >>> Olivier Mattelaer proposed the following answer:
> >>> Hi,
> >>>
> >>> I guess that what you are looking at is
> >>> generate p p > j j Z h QCD=0
> >>>
> >>> But please check the Feynman Diagram to check if this is what you are
> >>> looking for.
> >>>
> >>> Cheers,
> >>>
> >>> Olivier
> >>>
> >>> --
> >>> 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/679176/+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/679176
> >>>
> >>> 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/679176/+confirm?answer_id=3
>
> 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/679176
>
> You received this question notification because you asked the question.
>

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#6

Hi,

I guess that their is a confusion here. The notion of particle/anti-particle is ambiguous for t-channel particle.
So from what you said, I believe that you do have the Feynman Diagram that you are looking at.

Do I understand correctly the situation, or am I the one which is confused.
In that case, could you send me to my professional email (i.e. do not reply here/to this email), the Feynman diagram that you want and the one that are generated by MG.

Cheers,

Olivier

Revision history for this message
Kanhaiya Gupta (kanhaiya11) said :
#7

Here, I have attached the expected Feynman diagram, Feynman diagram
generated by MadGraph ( incorrect) .

I have also generated the vertex that I expect (generated in Madgraph).

Thank you

On Thu, Mar 14, 2019 at 2:22 AM Olivier Mattelaer <
<email address hidden>> wrote:

> Your question #679176 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/679176
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Hi,
>
> I guess that their is a confusion here. The notion of
> particle/anti-particle is ambiguous for t-channel particle.
> So from what you said, I believe that you do have the Feynman Diagram that
> you are looking at.
>
> Do I understand correctly the situation, or am I the one which is
> confused.
> In that case, could you send me to my professional email (i.e. do not
> reply here/to this email), the Feynman diagram that you want and the one
> that are generated by MG.
>
> Cheers,
>
> Olivier
>
> --
> 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/679176/+confirm?answer_id=5
>
> 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/679176
>
> You received this question notification because you asked the question.
>

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#8

Hi,

Could you send it to me to my professional address (you can click on my profile to have it) not trough launchpad, (as instructed in the previous exchange).
Attachments does not go trough launchpad question. If you want to stay on launchpad, please create a bug report they can have attachments.

Cheers,

Olivier

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