Delphes is not creating leptonic events , please help

[Arindam Das]

Dear Delphes Team,

I generated the process p p > mu+ mu- j in madgraph. The detector simulation is generated by the Delphes interfaced with MadGraph.

I generated for the 100 events but the event.lhco file contains only few 2 mu and a jet but most of the events contain 3 or 4 jets.

Can you tell me why is this happening ?

The event.lhco file is attached.

Regards,

Arindam

[Michele Selvaggi]

Hi Arindam,

it looks like you are using a not recent Delphes card, and muons are written both as muons and jets.
If I look at your Delphes card you are missing the following line:

add InputArray MuonIsolation/muons muons

after
add InputArray ElectronIsolation/electrons electrons, and before
add InputArray FastJetFinder/jets jets

in the UniqueObjectFinder module.
Please include that line (or use a more recent Delphes version)

Cheers,
Michele

[Arindam Das]

Dear Michele,
Thank you very much for the prompt reply. I have one more doubt regarding the old file . I have stated it below please help me.

Yes this is an old version.

I'll use the recent version.

In the old version shall I add this lines in Constituent filter as below ?

####################
# Constituent filter
####################

module ConstituentFilter ConstituentFilter {

# add JetInputArray InputArray

add JetInputArray GenJetFinder/jets

add InputArray ElectronIsolation/electrons electrons
add InputArray MuonIsolation/muons muons

add JetInputArray FastJetFinder/jets jets

You wrote the muons, electrons and jets twice but in the old file the jets are written once.
Shall I change the jets into twice as I have written before according to your suggestions?

I am switching into the new version after this is solved.

Regards,
Arindam

[Arindam Das]

Dear Michele,

Thank you very much for the prompt reply. I have one more doubt regarding the old file . I have stated it below please help me.

Yes this is an old version.

I'll use the recent version.

In the old version shall I add this lines in Constituent filter as below ?

####################
# Constituent filter
####################

module ConstituentFilter ConstituentFilter {

# add JetInputArray InputArray

add JetInputArray GenJetFinder/jets

add InputArray ElectronIsolation/electrons electrons
add InputArray MuonIsolation/muons muons

add JetInputArray FastJetFinder/jets jets

You wrote the muons, electrons and jets twice but in the old file the jets are written once.
Shall I change the jets into twice as I have written before according to your suggestions?

I am switching into the new version after this is solved.

Regards,
Arindam

[Arindam Das]

Dear Michele,

Here is the file generated by NEW DELPHES 3.12 . But is has the same problem.

I generate the following events from the new madgraph for the LO calculations :

generate p p > mu+ mu- @1
add process p p > mu+ mu- j @2

The pythia output is converted to root file using the new delphes and then the root file is converted into the lhco fomat using the new delphes. Still the error is there. Though I have seen that the CMS .tcl card contails the commands you mentioned above. I am uploading the files for your convenience. Please tell me what changes should I make ?

Regards

Arindam