MadGraph5_aMC@NLO

Install Pythia8+Delphes3+MadGraph5

Asked by navds

Dear all:
I am new to this forum as well as applied high energy physics. I try to install the full sets MadGraph5+MadAnalysis+Pythia8+Delphes3. I have ROOT5.34 on my linuxx8664gcc.

Could you help me by giving a step by step installation guide ? Thanks for your help.

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daniel camargo (dacamargov) said : 		#1

Hi Navalona

first make sure you have Python version 2.6 or 2.7 ; gfortran/gcc 4.6 or higher is required for NLO calculations/simulations.

1) go to this site... https://launchpad.net/mg5amcnlo and download the MG5. After that, unpacked the .tar.gz file (in terminal write... tar -xzf MG5_aMC_v2.1.2.tar.gz)

2) Run MG5... that is, with the terminal go to the directory of installation (in which you unpacked the .tar.gz and then have the file MG5_aMC_v2_1_2) and write ./bin/mg5_aMC

3) You will be have in terminal something like this:

MG5_aMC>

4) To install pythia, MadAnalysis, and Delphes just write as follows:

MG5_aMC> install program

in which program can be whichever pythia, delphes 2, 3, MadAnalysis.

Remember to install ExRootAnalysis as well...

5) There are a lot of tutorials in the web, try to read some of them.

cheers,

Daniel

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navds (navalona-ramanantoanina) said : 		#2

Dear Daniel,
Thanks for your response. I downloaded MG5_aMC_v2.1.2.tar.gz and tried to run the tutorial to see if it works. It does. Then I installed successfully ExRootAnalysis, MadAnalysis and Delphes. But for pythia, the package to be installed is named pythia-pgs. What if I want to use Pythia8 instead ?
Actually, I installed pythia8 and set up the variable $PYTHIA8. Then, how to tell MG5 to call this ?

Regards,

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Olivier Mattelaer (olivier-mattelaer) said : 		#3

Dear Navalona,

MadGraph5 (at Leading Order) is currently not able to launch the shower for Pythia8. So you will need to run Pythia8 manually on the lhe file produced by MadGraph.

Cheers,

Olivier

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navds (navalona-ramanantoanina) said : 		#4

Dear Daniel and Olivier,
I think my question is answered. Thank you for your help.

Cheers