Hi,
I try at the moment to make a comparison of full vs fast simulation for eta_c-> phi phi -> K+ K- K+ K- decay.
I did this analysis for central tracker TDR and I am updating the analysis macro.
I have a problem with vertex fitter PndKinVtxFitter if I want to access fitted daughter particles after the fit.
The code
PndKinVtxFitter vtxfitter(etac_vtx[j]);
vtxfitter.Fit();
works, but dauthers are unfitted:
RhoCandidate *etacfit=etac_vtx[j]->GetFit();
k1 = etacfit->Daughter(0);
I tried
k1 = etacfit->Daughter(0)->GetFit();
and it returns 0.
But the code
PndKinVtxFitter vtxfitter(etac_vtx[j]);
vtxfitter.FitAll();
which should work according to documentation
( https://panda-wiki.gsi.de/foswiki/bin/view/Computing/PandaRootAnalysisJu ly13#A_5.1_PndKinVtxFitter_45_Vertex_and_kinematic_fitting)
produce the
chi2_vtx=-9999 (chi2_vtx=vtxfitter.GetChi2()),
whereas with vtxfitter.Fit() chi2 were reasonable values.
So did anybody (means Ralf or Klaus) check PndKinVtxFitter::FitAll()?
Dima
GSI Forum
Search
Help
Members
Login
Home
