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Re: Not set McMotherIdx [message #14758 is a reply to message #14757] Wed, 15 May 2013 10:26 Go to previous messageGo to previous message
Andreas Pitka is currently offline  Andreas Pitka
Messages: 38
Registered: November 2011
Location: Gießen
continuous participant
From: *physik.uni-giessen.de
PndMcTruthMatch is doing something like the following

00075     // check whether the mothers of all daughters are the same
00076     for ( Int_t i=1; i<nd; ++i ) {
00077       Int_t dauidx = c.Daughter ( i )->GetMcIdx();
00078 
00079       if ( mct[dauidx].GetMcMotherIdx() != mothidx ) {
00080         if(verbose) Info("PndMcTruthMatch::MctMatch","rejected by not matching mother ids in daughters");
00081         return false;
00082       }
00083     }


where mct is the Monte Carlo RhoCandList. Without the MotherIdx set for the particles in the McTruth RhoCandList the PndMcTruthMatch is totally useless, since "Bool_t PndMcTruthMatch::MctMatch ( RhoCandidate& c, RhoCandList& mct, Int_t level, bool verbose )"
returns false all the time.

The problem is not getting the McTruth for a final state particle, but knowing for example if a D0 candidate is made of the tracks belonging to the Monte Carlo Daughters.

[Updated on: Wed, 15 May 2013 10:26]

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