How to fill histo with specific particle?

[Goko]

Hi,

I want to access branches and fill my histogram with specific particle's Pt..
For example filling histogram with (Pi0 Pt)..
How can i do this?
I made this kind of job with Electron,Muon etc but with specific particle is this possiable?

Thank you.

[Michele Selvaggi]

What exact list of particle do you need?
Pi0 will be mostly recosntructed as photons in Delphes.
If you need particles before reconstruction you can always use the Particle branch.

[Goko]

I need Kaons Pt.
There is a sample in pythia called pythiaexample.c
You can do p p collision 7000 GeV
and you choose the pdg number of particle.
It gives you Pt/dN histo.
I tried to do spmething like this in MadGraph.
But it seems not possiable.
Now, i am planing to produce data with pythia and feed Delphes with lhe file...

[Goko]

For efficiency plot
i need two root file.
One is par level other is reco level