MadGraph5_aMC@NLO

mg5_aMC doesn't allow me to to use delphes(3.4.2) for analysis

Asked by Jakob Lundström

Hello,
I an new to madgraph5.
When I enter the launch command in the CLI I get the following options:
/===========================================================================\
| 1. Choose the shower/hadronization program shower = OFF |
| 2. Choose the detector simulation program detector = OFF |
| 3. Choose an analysis package (plot/convert) analysis = Not Avail. |
| 4. Decay onshell particles madspin = OFF |
| 5. Add weights to events for new hypp. reweight = Not Avail. |
\===========================================================================/
However, for detector both PGS and Delphes are available options. When I do run Delphes for detector I get the following messages:
INFO: Warning! Never use this lhe file for detector studies!
INFO: finish
INFO: No pgs_card detected, so not run pgs
INFO: prepare delphes run
INFO: Running Delphes
INFO: If you are interested in lhco output. please run root2lhco converter.
INFO: or edit bin/internal/run_delphes3 to run the converter automatically.
INFO: delphes done
What is it that has gone wrong?

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MadGraph5_aMC@NLO Edit question
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Solved by:
Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

Nothing went wrong as far as I can see.
Looks like that you are using Pythia6 + madanalysis4 (correct?)
and in that mode, madanalysis4 create a lhe file from the sdhep output of py6 such that it can be plotted.
That lhe file has some (non infrared safe) jet clustering applied and therefore you should not use that one for detector studies.
This is the reason of that warning.

For Delphes, no warning at all, it just tells you that by default we do not create the outdated lhco output format anymore and tells you how to create it if you need it.

So everything seems ok

Cheers,

Olivier

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Jakob Lundström (jakoblundst) said : 		#2

Ok, but how do I make analysis available in madgragh? Do I need to download something? (Right now I have only downloaded ROOT,Madgraph5 and Delphes.)

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Olivier Mattelaer (olivier-mattelaer) said : 		#3

The most used analysis tools is MadAnalysis5
you can install with the command "install MadAnalysis5"

Cheers,

Olivier

Revision history for this message
Jakob Lundström (jakoblundst) said : 		#4

Thanks Olivier Mattelaer, that solved my question.