Simulation of weak decays

Rootfile

A) A file with electron momentum (px,py,pz) as a function of (x,y,z) in bins of size (deltax, deltay, deltaz)

B) A file with photons from external bremsstrahlung with momentum (0,0,pz) as a function of (x,y,z) in same bin sizes.

As a first and maybe good enough approximation the photon momenta in px and py can be neglected since the photon spectrum
is forward peaked. A refinement would be to include px and py but that would be a second calculation.

A first approximation would be bins of 1cm x 1cm x 1cm.

With such distributions of electron and photon momenta in the target one could subsequently start vertices anywhere
in the target for pions, hyperons, etc. and follow their paths or decay products through the magnets.

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