Commenting out some module in TreeWriter

[amit]

Hi,

I do not want to write the particle information in the root file, because it makes the root file size bigger. So, in the 'TreeWriter' module section of tcl card, I commented the following line --

# add Branch Delphes/allParticles Particle GenParticle

and made the root file. But now, when I make the lhco file and compare both, I find that pt, eta, phi ... values has changed. Is this expected/Wrong?

This 'TreeWriter' section is only for printing to the root file. Isn't it? Commenting out one module shouldn't affect the other modules.

Thanks,
Amit

[Pavel Demin]

But now, when I make the lhco file and compare both, I find that pt, eta, phi ... values has changed. Is this expected/Wrong?

Delphes randomly smears the momenta of all the simulated objects. So, I'd say that it's expected.

If exactly the same results are needed when running Delphes multiple times over the same input file, then the RandomSeed parameter should be set to a fixed nonzero value.

[amit]

As you said, I changed in the card and I got same distributions. Thank you very much.