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I am new to geant4 physics. I have some questions about the order of physics processes:
1)What do the numbers in the function pManager->AddProcess(new G4eplusAnnihilation(), 0,-1, 4) mean? Do these numbers mean the order of invocation of DoIt() methods? The smaller the number is, the earlier the corresponding DoIt() method is invoked or inverse?
2)Why does the order of invocation of DoIt() methods have to be inverse of that of GetPhysicalInteractionLength()?
3)Why do the transportation and multiple scattering be the last two processes of AlongGetPhysicalInteractionLength(…) method? Is there any special physical meaning there?
Thanks in advance.
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