MadGraph5_aMC@NLO

How to deduce the PID code of the particle

Asked by Songshaptak De

Hi,
While editing the dummy_tcf.f file, is there any way to identify a particle by utilizing their PID codes ?

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

HI,

Not really.

Due to code optimization the PDG code that you can access within dummy_cuts.f is not the final PDG code.
The PDG code can be modified according to symmetry (an electron in dummy_cuts.f can be written as a muon in the events file).

Now if you do not have such level of optimization in your case,
you can use the following lines

      integer idup(nexternal,maxproc,maxsproc)
      integer mothup(2,nexternal)
      integer icolup(2,nexternal,maxflow,maxsproc)
      include 'leshouche.inc'

and then you will have the pdg code defined in the idup variable.

Cheers,

Olivier

Therefore using PDG code is not advised.

First due to symmetry some PDG code are identify to another PDG code.
(for example, the PDG code of the muon might never appear at that level -- you will always see the one of the electron--)
Even if it sometimes ha

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