off-shell condition in NLO calculation.

Asked by Md.Raju on 2019-11-09

Dear Madgraph experts,

I am interested in the following process: g g > h h [QCD] and it also contain the diagrammes g g > h h (Box)and g g > h > h h(triangular) and g g > H > h h(triangular) I want the off-shell contribution of g g > H > h h in cross section so how can I impose the H particle off-shell in calculation in cross section as there is no any simple syntax as LO calculation in madgraph.

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
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Last query:
2019-11-09
Last reply:
2019-11-20

Since this is a LO process you can use the LO syntax.

generate p p > h h $ H [QCD]

Cheers,

Olivier

> On 9 Nov 2019, at 09:03, Md.Raju <email address hidden> wrote:
>
> New question #685709 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/685709
>
> Dear Madgraph experts,
>
> I am interested in the following process: g g > h h [QCD] and it also contain the diagrammes g g > h h (Box)and g g > h > h h(triangular) and g g > H > h h(triangular) I want the off-shell contribution of g g > H > h h in cross section so how can I impose the H particle off-shell in calculation in cross section as there is no any simple syntax as LO calculation in madgraph.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Md.Raju (rahi199065) said : #2

Thak you for the response
When I am doing this the error showin is
Command "generate g g > h h $ H [QCD]" interrupted with error:
InvalidCmd : $ syntax not valid for aMC@NLO. $$ syntax is on the other hand
a valid syntax.

On Sat, Nov 9, 2019 at 5:39 PM Olivier Mattelaer <
<email address hidden>> wrote:

> Your question #685709 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/685709
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Since this is a LO process you can use the LO syntax.
>
> generate p p > h h $ H [QCD]
>
> Cheers,
>
> Olivier
>
> > On 9 Nov 2019, at 09:03, Md.Raju <email address hidden>
> wrote:
> >
> > New question #685709 on MadGraph5_aMC@NLO:
> > https://answers.launchpad.net/mg5amcnlo/+question/685709
> >
> > Dear Madgraph experts,
> >
> > I am interested in the following process: g g > h h [QCD] and it also
> contain the diagrammes g g > h h (Box)and g g > h > h h(triangular) and g g
> > H > h h(triangular) I want the off-shell contribution of g g > H > h h in
> cross section so how can I impose the H particle off-shell in calculation
> in cross section as there is no any simple syntax as LO calculation in
> madgraph.
> >
> > --
> > 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/685709/+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/685709
>
> You received this question notification because you asked the question.
>

Hi,

For me it works. Maybe you are using a too old version of the code?

MG5_aMC>generate p p > xd xd~ j $h [QCD] /a z w+ w-
------------------------------------------------------------------------
 No Born diagrams found. Now switching to the loop-induced mode.
 Please cite ref. 'arXiv:1507.00020' when using results from this mode.
------------------------------------------------------------------------
16 processes with 42 diagrams generated in 14.401 s
Total: 16 processes with 42 diagrams

Cheers,

Olivier

> On 9 Nov 2019, at 15:32, Md.Raju <email address hidden> wrote:
>
> Question #685709 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/685709
>
> Status: Answered => Open
>
> Md.Raju is still having a problem:
> Thak you for the response
> When I am doing this the error showin is
> Command "generate g g > h h $ H [QCD]" interrupted with error:
> InvalidCmd : $ syntax not valid for aMC@NLO. $$ syntax is on the other hand
> a valid syntax.
>
> On Sat, Nov 9, 2019 at 5:39 PM Olivier Mattelaer <
> <email address hidden>> wrote:
>
>> Your question #685709 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/685709
>>
>> Status: Open => Answered
>>
>> Olivier Mattelaer proposed the following answer:
>> Since this is a LO process you can use the LO syntax.
>>
>> generate p p > h h $ H [QCD]
>>
>> Cheers,
>>
>> Olivier
>>
>>> On 9 Nov 2019, at 09:03, Md.Raju <email address hidden>
>> wrote:
>>>
>>> New question #685709 on MadGraph5_aMC@NLO:
>>> https://answers.launchpad.net/mg5amcnlo/+question/685709
>>>
>>> Dear Madgraph experts,
>>>
>>> I am interested in the following process: g g > h h [QCD] and it also
>> contain the diagrammes g g > h h (Box)and g g > h > h h(triangular) and g g
>>> H > h h(triangular) I want the off-shell contribution of g g > H > h h in
>> cross section so how can I impose the H particle off-shell in calculation
>> in cross section as there is no any simple syntax as LO calculation in
>> madgraph.
>>>
>>> --
>>> 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/685709/+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/685709
>>
>> 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.

Md.Raju (rahi199065) said : #4

Its solved my problem ,thank you .

On Sat, Nov 9, 2019 at 10:52 PM Olivier Mattelaer <
<email address hidden>> wrote:

> Your question #685709 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/685709
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Hi,
>
> For me it works. Maybe you are using a too old version of the code?
>
> MG5_aMC>generate p p > xd xd~ j $h [QCD] /a z w+ w-
> ------------------------------------------------------------------------
> No Born diagrams found. Now switching to the loop-induced mode.
> Please cite ref. 'arXiv:1507.00020' when using results from this mode.
> ------------------------------------------------------------------------
> 16 processes with 42 diagrams generated in 14.401 s
> Total: 16 processes with 42 diagrams
>
> Cheers,
>
> Olivier
>
> > On 9 Nov 2019, at 15:32, Md.Raju <email address hidden>
> wrote:
> >
> > Question #685709 on MadGraph5_aMC@NLO changed:
> > https://answers.launchpad.net/mg5amcnlo/+question/685709
> >
> > Status: Answered => Open
> >
> > Md.Raju is still having a problem:
> > Thak you for the response
> > When I am doing this the error showin is
> > Command "generate g g > h h $ H [QCD]" interrupted with error:
> > InvalidCmd : $ syntax not valid for aMC@NLO. $$ syntax is on the other
> hand
> > a valid syntax.
> >
> > On Sat, Nov 9, 2019 at 5:39 PM Olivier Mattelaer <
> > <email address hidden>> wrote:
> >
> >> Your question #685709 on MadGraph5_aMC@NLO changed:
> >> https://answers.launchpad.net/mg5amcnlo/+question/685709
> >>
> >> Status: Open => Answered
> >>
> >> Olivier Mattelaer proposed the following answer:
> >> Since this is a LO process you can use the LO syntax.
> >>
> >> generate p p > h h $ H [QCD]
> >>
> >> Cheers,
> >>
> >> Olivier
> >>
> >>> On 9 Nov 2019, at 09:03, Md.Raju <<email address hidden>
> >
> >> wrote:
> >>>
> >>> New question #685709 on MadGraph5_aMC@NLO:
> >>> https://answers.launchpad.net/mg5amcnlo/+question/685709
> >>>
> >>> Dear Madgraph experts,
> >>>
> >>> I am interested in the following process: g g > h h [QCD] and it also
> >> contain the diagrammes g g > h h (Box)and g g > h > h h(triangular) and
> g g
> >>> H > h h(triangular) I want the off-shell contribution of g g > H > h h
> in
> >> cross section so how can I impose the H particle off-shell in
> calculation
> >> in cross section as there is no any simple syntax as LO calculation in
> >> madgraph.
> >>>
> >>> --
> >>> 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/685709/+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/685709
> >>
> >> 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/685709/+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/685709
>
> You received this question notification because you asked the question.
>