|Message: Re: What are y and dydx in the equation of motion?||Not Logged In (login)|
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Dear Bertalan, Your question is very good. My notes at hand are that the components of these vectors are: [y] 0, 1, 2: (x, y, z) in Geant4 length units (mm by default) 3, 4, 5: (px, py, pz) in Geant4 momentum units (GeV/c) 7: time in lab frame Likely other components are not needed or important dyds are the derivatives of the above with respect to the distance along the curve, (hence the name). The units (of ds) are length in G4 units. I suggest that your additional code will be more portable if you retain, to the extent possible, the unit convention of G4 (adding a unit for all quantities that you specify in your code.) I hope that this provides the necessary starting point for creating your equation of motion. Best regards, John Apostolakis
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