delphes_card.dat neutralino missing energy

Asked by Kiel Howe on 2013-03-14

When using Magraph5 v1.5.8 with Delphes3 installed via "install Delphes", the default delphes_card.dat (as well as ATLAS and CMS flavors) do not appear to properly treat a neutralino LSP (pdg=1000022) as missing energy.

Adding the line "add EnergyFraction {1000022} {0.0 0.0}" to the "Calorimeter" module appears to fix this problem. Is this the correct fix and should it be included in the default card?

Thanks!

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Solved by:
Kiel Howe
Solved:
2013-03-16
Last query:
2013-03-16
Last reply:
2013-03-14

Hi Kiel, (cc delphes author)

I've no idea about that but I guess that you are right.
In fact, we use the default card present in the Delphes program.
So I put the Delphes author in cc such that they can do this modification.

as soon as they did, doing "install Delphes" will replace the default cards.

Thanks a lot for the information,

Olivier

PS For the Delphes author:
In principle you need to add all neutralino not just the LSP.

On Mar 14, 2013, at 6:06 PM, Kiel Howe <email address hidden> wrote:

> New question #224328 on MadGraph5:
> https://answers.launchpad.net/madgraph5/+question/224328
>
> When using Magraph5 v1.5.8 with Delphes3 installed via "install Delphes", the default delphes_card.dat (as well as ATLAS and CMS flavors) do not appear to properly treat a neutralino LSP (pdg=1000022) as missing energy.
>
> Adding the line "add EnergyFraction {1000022} {0.0 0.0}" to the "Calorimeter" module appears to fix this problem. Is this the correct fix and should it be included in the default card?
>
> Thanks!
>
> --
> You received this question notification because you are a member of
> MadTeam, which is an answer contact for MadGraph5.

Pavel Demin (pavel-demin) said : #2

Yes, it's correct to include "add EnergyFraction {1000022} {0.0 0.0}" in the Calorimeter configuration.

We'll add this modification to the next Delphes release including other neutralinos:

1000022
1000023
1000025
1000035
1000045

Kiel Howe (howek-2) said : #3

Great, thanks!