Mixture of transverse & longitudinal w bosons generation

Asked by Songshaptak De on 2019-05-23

Hi,

I want to generate a process in Madgraph which will give a mix of transverse and longitudinally polarised w+ boson. I was generating p p > w+ w- j j QED=4 in madgraph and when I was making the spin distribution of the w+ bosons, I saw 98% of the total events contain has w+ boson with spin 1, which suggests that almost all the w+ bosons are transversely polarized.
Can you guys suggest any other process to simulate in madgraph which will give me a good mixture of w+ bosons having spin 1 and spin 0?

~Saptak

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Last query:
2019-05-23
Last reply:
2019-05-24

I do not know,

maybe p p > w+ w- j j QCD=0
or
 p p > w+ w-

Cheers,

Olivier

> On 23 May 2019, at 11:47, Songshaptak De <email address hidden> wrote:
>
> New question #681023 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/681023
>
> Hi,
>
> I want to generate a process in Madgraph which will give a mix of transverse and longitudinally polarised w+ boson. I was generating p p > w+ w- j j QED=4 in madgraph and when I was making the spin distribution of the w+ bosons, I saw 98% of the total events contain has w+ boson with spin 1, which suggests that almost all the w+ bosons are transversely polarized.
> Can you guys suggest any other process to simulate in madgraph which will give me a good mixture of w+ bosons having spin 1 and spin 0?
>
> ~Saptak
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Songshaptak De (zaptac) said : #2

Will the process p p > w+ w- j j QED=4 in Madgraph generate WW scattering as one of the Feynman Diagrams ?

You should look at the Feynman diagram in order to know that.
The answer technically depend of the model so I can not answer that question (but in general yes it does)

Cheers,

Olivier

> On 24 May 2019, at 08:43, Songshaptak De <email address hidden> wrote:
>
> Question #681023 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/681023
>
> Songshaptak De posted a new comment:
> Will the process p p > w+ w- j j QED=4 in Madgraph generate WW
> scattering as one of the Feynman Diagrams ?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Can you help with this problem?

Provide an answer of your own, or ask Songshaptak De for more information if necessary.

To post a message you must log in.