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Question Shooting a short-lived particle through G4ParticleGun 

Forum: Particles
Date: 04 Jun, 2015
From: Krishna Kulkarni <Krishna Kulkarni>

Hi,

I have constructed a simple CMS detector in GEANT4 and I want to simulate p-p collision in it.

I have generated ASCII and .root files from Pythia and shooting those generated particles though G4ParticleGun.

But when quarks come in picture, it shows following error :

-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : Event0102
      issued by : G4ParticleGun::SetParticleDefinition()
G4ParticleGun does not support shooting a short-lived particle without a valid decay table.
G4ParticleGun::SetParticleDefinition for u_quark is ignored.

Please let me know how to generate or assign decay table to a particle.

Thank you.

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