this looks like a perfect question for some ALICE software mailing list. ALICE folks: could you point Annalisa to the right list? -best, Pasha On Mon, 06 May 2002 16:44:29 +0200 (CEST) "Annalisa De Caro" <decaro@mail6.cern.ch> wrote: > Hi rooters, > my problem is the definition of a primary particle. > Until now, i selected (or i thought to select) the primary particles in > the Hijing (Pb-Pb) events in this fashion: > GetFirstMother()<0 > (i find this selection type in the macro anal.C in the directory > $ALICE_ROOT/macros); > but with the same selection with Pythia generator (and proton-proton > events) i did not found primary particles (that is, with > GetFirstMother()<0), while i found particles with: > GetSecondMother()<0... > My problem is the definition of a primary particle... > Thank you > Annalisa > > > Hi Annalisa - could you be a bit more explicit in your description of > > the problem? -best, Pasha > > > > On Fri, 03 May 2002 16:09:57 +0200 (CEST) > > "Annalisa De Caro" <decaro@mail6.cern.ch> wrote: > > > > > Hi rooters, > > > Can you help me to understand what is the physical means of these methods: > > > (Get/Set)FirstMother > > > (Get/Set)SecondMother > > > which appartain to the TParticle class? > > > I had the prolem to define a particle as primaries... > > > Thank you in advance > > > Annalisa > > >
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