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Pnd4CFitter - how to use it [message #15385] Fri, 30 August 2013 15:03 Go to previous message
Elisabetta Prencipe (2) is currently offline  Elisabetta Prencipe (2)
Messages: 213
Registered: February 2013
first-grade participant
From: *ikp.kfa-juelich.de
Dear Rho experts,

I am reconstructing the meson Ds(2536)+ through its decay to D*0 K+, D*0 to D0 gamma, D0 to K-pi+.

With the vertex fit or the mass constrained fit, no problems...I mean, I get troubles with the reconstruction of neutrals such as gammas, but this is another topic. My question now is the following: I have my Ds2535 list, and I write:


for (j=0;j<Ds2535.GetLength();++j)
{
Pnd4CFitter fitter(Ds2535[j],ini);
fitter.FitConserveMasses();
double chi2_4c=fitter.GetChi2();
hm_chi2_4c->Fill(chi2_4c);

if (chi2_4c<40)
{
RhoCandidate *jfit = Ds2535[j]->GetFit();
RhoCandidate *jfit2=Ds2535[j]->Daughter(0)->GetFit();

h_4cf->Fill(jfit->M());
h_4cf2->Fill(jfit2->M());

}
}

The histograms are filled, but with crazy results. What am I doing so wrong? thank you for any feedback!
Elisabetta
 
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