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I've problems understanding the kinematics of the primary particle when I ask its info by means of a_event->GetPrimaryVertex()->GetPrimary()->Print(); I call this in a "RecordBeginOfEvent(const G4Event* a_event)" methode.
I checked for three types of beamparticle: gamma, electron and proton, each with a (kinetic) energy of 1000 Mev. The output contains the following information. 1) for the gamma: ==== PDGcode 22 Particle name gamma Assigned charge : 0 Momentum ( 0, 0, 1000 ) Polarization ( 0, 0, 0 ) Weight : 1 <<<< End of link
total momentum seems ok
2) for the electron: ==== PDGcode 11 Particle name e- Assigned charge : -1 Momentum ( 0, 0, 1000.51 ) Polarization ( 0, 0, 0 ) Weight : 1 <<<< End of link
Momentum = kinetic energy + electron_mass??
3) for the proton ==== PDGcode 2212 Particle name proton Assigned charge : 1 Momentum ( 0, 0, 1696.04 ) Polarization ( 0, 0, 0 ) Weight : 1 <<<< End of link
Can someone explain me how the (total) momentum of the particle is calculated??
thanks in advance,
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