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Home » PANDA » PandaRoot » Analysis » [FIXED] Mc Truth Match
Re: Mc Truth Match [message #15290 is a reply to message #15285] Wed, 21 August 2013 13:16 Go to previous messageGo to previous message
MartinJGaluska is currently offline  MartinJGaluska
Messages: 203
Registered: March 2010
Location: Germany
first-grade participant
From: *physik.uni-giessen.de
I would like to add that I have just cross-checked the method

theAnalysis->FillList(piall,"PionAll");
pimatchplus.Cleanup();
pimatchminus.Cleanup();
	// for pimatch
		for ( int ii=0 ; ii<piall.GetLength() ; ++ii ){
			if ( theAnalysis->McTruthMatch(piall[ii]) ){
				if ( 0 < piall[ii]->PdgCode() ){
					pimatchplus.Add( piall[ii] );
				}
				if ( 0 > piall[ii]->PdgCode() ){
					pimatchminus.Add( piall[ii] );
				}

			}
		}


with the following method

SelectWithMcTruthPdgSimulateMcMatch(piall, pdgpiplus, 211);

int SelectWithMcTruthPdgSimulateMcMatch(RhoCandList &lOld, RhoCandList &lNew, Int_t SelectCandidatesWithPdgCode) {
	lNew.Cleanup();
	int notSelected = 0;
	for ( int ii=lOld.GetLength()-1; ii>=0; --ii ) {
		if ( ( lOld[ii]->GetMcTruth()->PdgCode() == SelectCandidatesWithPdgCode ) && ( lOld[ii]->PdgCode() == SelectCandidatesWithPdgCode ) ) {
			lNew.Add( lOld[ii] );
		} else {
			notSelected++;
		}
	}
	return notSelected;
}


for pions from 10k events simulated with the rho tutorial and 1k events of psi(4040) to D0 anti-D0 / D+ D- and all D decays allowed.

In other words, the McTruthMatch gives results consistent with checking the McTruth Pdg info directly (at least for charged particles, I have not checked resonances).
 
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