PythiaDelphes Particle Gun Example

[Matthew James]

I was wondering what the motivation is for sending single particles to Delphes within the DelphesPythia8 module with the log distribution given in DelphesPythia8.cpp:

pMin = 0.1 GeV for single particles
pp = pow(10, - 1.0 + (log10(pMax) + 1.0) * rndm.flat());

If anyone could provide me with some physical intuition that would be great.

[Pavel Demin]

The particle gun in DelphesPythia8.cpp is used by the validation script:

https://cp3.irmp.ucl.ac.be/projects/delphes/browser/git/validation/validation.sh

[Matthew James]

Thanks pavel. Is there any particular reason why this distribution is selected over any other?

[Pavel Demin]

If I'm not mistaken, the idea is to obtain a flat pseudo-rapidity distribution.