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paus |
1.1 |
#include "MitEdm/VertexFitInterface/interface/MvfInterface.h"
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bendavid |
1.2 |
#include "MitEdm/DataFormats/interface/Types.h"
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#include "TMath.h"
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#include "TMatrixDSym.h"
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#include "TVectorD.h"
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paus |
1.1 |
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paus |
1.4 |
using namespace TMath;
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paus |
1.1 |
using namespace reco;
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using namespace mitedm;
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const int cms2GenMap[5] = { 1, 0, 4, 3, 2 }; // parameter map: transfer CMS to generic coordinates
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MvfInterface::MvfInterface(MultiVertexFitter *fitter) :
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_mvf (fitter),
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_fCurv0(0.5 * 0.0029979),
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_fCurv (_fCurv0 * fitter->bField())
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{
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}
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bool MvfInterface::addTrack(const reco::Track* trk, const int id, const float mass,
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MultiVertexFitter::vertexNumber jv)
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{
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// Fill the parameters and matrix compliant with the generic fitter this involves remapping and a
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// simple parameter transformation
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bendavid |
1.2 |
TVectorD params(5); // track parameters
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paus |
1.4 |
FiveMatrix dPidPj;
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bendavid |
1.2 |
TMatrixDSym covmat(5);
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paus |
1.4 |
params[0] = 1.0/Tan(PiOver2() - trk->lambda()); //cotTheta
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params[1] = _fCurv*trk->qoverp()/Cos(trk->lambda()); //curvature
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params[2] = trk->dsz()/Cos(trk->lambda()); //z0
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bendavid |
1.3 |
params[3] = -trk->dxy(); //d0
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params[4] = trk->phi(); //phi0
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bendavid |
1.2 |
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paus |
1.4 |
// dPidPj(i,j) gives partial dx_i/dy_j where x are the new parameters and y are the old ones
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dPidPj(0,0) = 0;
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dPidPj(0,1) = -1.0/(Sin(PiOver2() - trk->lambda())*Sin(PiOver2() - trk->lambda()));
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dPidPj(0,2) = 0;
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dPidPj(0,3) = 0;
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dPidPj(0,4) = 0;
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dPidPj(1,0) = _fCurv/Cos(trk->lambda());
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dPidPj(1,1) = _fCurv*Abs(trk->qoverp())*Tan(trk->lambda())/Cos(trk->lambda());
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dPidPj(1,2) = 0;
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dPidPj(1,3) = 0;
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dPidPj(1,4) = 0;
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dPidPj(2,0) = 0;
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dPidPj(2,1) = -trk->dsz()*Tan(trk->lambda())/Cos(trk->lambda());
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dPidPj(2,2) = 0;
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dPidPj(2,3) = 0;
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dPidPj(2,4) = 1.0/Cos(trk->lambda());
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dPidPj(3,0) = 0;
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dPidPj(3,1) = 0;
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dPidPj(3,2) = 0;
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dPidPj(3,3) = -1.0;
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dPidPj(3,4) = 0;
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dPidPj(4,0) = 0;
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dPidPj(4,1) = 0;
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dPidPj(4,2) = 1.0;
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dPidPj(4,3) = 0;
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dPidPj(4,4) = 0;
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bendavid |
1.2 |
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for (Int_t i=0; i<5; i++)
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for (Int_t j=0; j<5; j++) {
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covmat(i,j)=0;
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for (Int_t k=0; k<5; k++)
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for (Int_t l=0; l<5; l++)
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paus |
1.4 |
covmat(i,j) += dPidPj(i,k)*dPidPj(j,l)*trk->covariance(k,l);
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paus |
1.1 |
}
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bendavid |
1.2 |
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paus |
1.1 |
return (_mvf->addTrack(params,covmat,id,mass,jv));
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}
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