MSSM event generation with SUSYHIT output

Asked by Saurabh Niyogi on 2019-05-06

Hello,

 I am generating squark pair in MG5v 2.4.3 using SUSYHit SLHA-1 output. I just change the squark masses by-hand in BLOCK MASS without changing any other parameters (Aq, tan beta, mu etc). Does this replicate simplified model ? All I want to generate squark pair produced events, I am not bothered about cross section. I have tried and this is running. I want to know if the events so generated are faithful ? Thanks,

Saurabh

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Solved by:
Olivier Mattelaer
Solved:
2019-05-07
Last query:
2019-05-07
Last reply:
2019-05-06

I am not a susy expert so I would suggest to discuss this with someone more expert.

For me simplified model means all mass very heavy but two. In this case the square mass and the neutralino.

Now I guess the important point for you is to check the Feynman diagram to be sure that you do not have any unwanted ones

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________________________________
From: <email address hidden> on behalf of Saurabh Niyogi <email address hidden>
Sent: Monday, May 6, 2019 5:53 AM
To: Olivier Mattelaer
Subject: [Question #680651]: MSSM event generation with SUSYHIT output

New question #680651 on MadGraph5_aMC@NLO:
https://answers.launchpad.net/mg5amcnlo/+question/680651

Hello,

I am generating squark pair in MG5v 2.4.3 using SUSYHit SLHA-1 output. I just change the squark masses by-hand in BLOCK MASS without changing any other parameters (Aq, tan beta, mu etc). Does this replicate simplified model ? All I want to generate squark pair produced events, I am not bothered about cross section. I have tried and this is running. I want to know if the events so generated are faithful ? Thanks,

Saurabh

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contact for MadGraph5_aMC@NLO.

True, I keep all the other masses heavy. So, I guess your answer is affirmative that this way of generating events is fine...
We can just modify the masses directly by-hand in the SLHA file without changing any parameters and do our analysis with those events. Thanks for your reply.

If your question is: is it allow to modify the param_card by hand. Yes it is.
However some model does not have all parameter as free parameter and/or they might exists parameter that have physical limit.
In some model (especially SUSY) all parameters are noted as independent and this is up to the user to set the parameter as consistent.

So you need to know what is the model that you are using and when it is valid (not only for the param_card but if they are other hyppothesis in the model which poses constraint on your model). This is why I said that you need to ask your question to a SUSY expert.

Cheers,

Olivier

Thanks Olivier Mattelaer, that solved my question.