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Forum: Fields: Magnetic and Otherwise
Re: None What are y and dydx in the equation of motion? (Bertalan Juhasz)
Re: None Re: What are y and dydx in the equation of motion? (John Apostolakis)
Date: 07 Apr, 2004
From: michel maire <michel maire>

User John Apostolakis wrote:

>> 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

 Default Geant4 momemtum unit is MeV/c
 Time is nanosecond

see in CLHEP: HEPSystemOfUnits.h

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