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Re: problem with TPC recotasks [message #6173 is a reply to message #6172] Thu, 27 March 2008 15:49 Go to previous messageGo to previous message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant
From: *physik.uni-giessen.de
Alicia Sanchez wrote on Thu, 27 March 2008 14:25

the TrackId so far i know, is the number
associated to one particle in the stack.
As the particles are entering the volume
they are listed in the stack.
-1 0 1 2 ....


particles (primaries) get number -1
their secondaries or decay products
are getting a new id = -1 + 1, as they are produced
and so on.



Just to correct,
the TrackId starts from 0 (or 1, I do not remember now). MotherId starts from -1. MotherId is equal to the TrackId of the mother particle. This means that, if the particle is primary, it has no mother -> MotherId = -1 (dummy number, there are no particles with trackId = -1).

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