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#include <ConstrainedTreeBuilderT.h>
Public Member Functions | |
| template<int nTrk> | |
| RefCountedKinematicTree | buildTree (const std::vector< RefCountedKinematicParticle > &initialParticles, const std::vector< KinematicState > &finalStates, const RefCountedKinematicVertex vtx, const ROOT::Math::SMatrix< double, 3+7 *nTrk, 3+7 *nTrk, ROOT::Math::MatRepSym< double, 3+7 *nTrk > > &fCov) const |
| ConstrainedTreeBuilderT () | |
| ~ConstrainedTreeBuilderT () | |
Private Member Functions | |
| RefCountedKinematicTree | buildRealTree (const RefCountedKinematicParticle virtualParticle, const RefCountedKinematicVertex vtx, const std::vector< RefCountedKinematicParticle > &particles) const |
Static Private Member Functions | |
| template<int nTrk> | |
| static AlgebraicSymMatrix77 | covarianceMatrix (std::vector< RefCountedKinematicParticle > rPart, const AlgebraicVector7 &newPar, const ROOT::Math::SMatrix< double, 3+7 *nTrk, 3+7 *nTrk, ROOT::Math::MatRepSym< double, 3+7 *nTrk > > &fitCov) |
Private Attributes | |
| VirtualKinematicParticleFactory | pFactory |
| KinematicVertexFactory | vFactory |
Class constructing te final output tree for the constrained vertex fitter. To be used by corresponding fitter only. Tree builders are scheduled for generalization: They should be inherited from the single generic class in the next version of the library.
Definition at line 15 of file ConstrainedTreeBuilderT.h.
| ConstrainedTreeBuilderT::ConstrainedTreeBuilderT | ( | ) | [inline] |
Definition at line 20 of file ConstrainedTreeBuilderT.h.
{}
| ConstrainedTreeBuilderT::~ConstrainedTreeBuilderT | ( | ) | [inline] |
Definition at line 22 of file ConstrainedTreeBuilderT.h.
{}
| RefCountedKinematicTree ConstrainedTreeBuilderT::buildRealTree | ( | const RefCountedKinematicParticle | virtualParticle, |
| const RefCountedKinematicVertex | vtx, | ||
| const std::vector< RefCountedKinematicParticle > & | particles | ||
| ) | const [private] |
Definition at line 8 of file ConstrainedTreeBuilderT.cc.
References KinematicTree::movePointerToTheTop(), KinematicTree::replaceCurrentParticle(), diffTreeTool::tree, KinematicVertexFactory::vertex(), and vFactory.
Referenced by buildTree().
{
//making a resulting tree:
RefCountedKinematicTree resTree = ReferenceCountingPointer<KinematicTree>(new KinematicTree());
//fake production vertex:
RefCountedKinematicVertex fVertex = vFactory.vertex();
resTree->addParticle(fVertex, vtx, virtualParticle);
//adding final state
for(std::vector<RefCountedKinematicParticle>::const_iterator il = particles.begin(); il != particles.end(); il++)
{
if((*il)->previousParticle()->correspondingTree() != 0)
{
KinematicTree * tree = (*il)->previousParticle()->correspondingTree();
tree->movePointerToTheTop();
tree->replaceCurrentParticle(*il);
RefCountedKinematicVertex cdVertex = resTree->currentDecayVertex();
resTree->addTree(cdVertex, tree);
}else{
RefCountedKinematicVertex ffVertex = vFactory.vertex();
resTree->addParticle(vtx,ffVertex,*il);
}
}
return resTree;
}
| RefCountedKinematicTree ConstrainedTreeBuilderT::buildTree | ( | const std::vector< RefCountedKinematicParticle > & | initialParticles, |
| const std::vector< KinematicState > & | finalStates, | ||
| const RefCountedKinematicVertex | vtx, | ||
| const ROOT::Math::SMatrix< double, 3+7 *nTrk, 3+7 *nTrk, ROOT::Math::MatRepSym< double, 3+7 *nTrk > > & | fCov | ||
| ) | const |
Method constructing tree out of set of refitted states, vertex, and full covariance matrix.
Definition at line 60 of file ConstrainedTreeBuilderT.h.
References a, buildRealTree(), DeDxDiscriminatorTools::charge(), i, LogDebug, n, AlCaHLTBitMon_ParallelJobs::p, VirtualKinematicParticleFactory::particle(), pFactory, mathSSE::sqrt(), and z.
{
if (!vertex->vertexIsValid()) {
LogDebug("RecoVertex/ConstrainedTreeBuilder")
<< "Vertex is invalid\n";
return ReferenceCountingPointer<KinematicTree>(new KinematicTree());
}
AlgebraicVector3 vtx;
vtx(0) = vertex->position().x();
vtx(1) = vertex->position().y();
vtx(2) = vertex->position().z();
AlgebraicMatrix33 vertexCov = fullCov.template Sub<ROOT::Math::SMatrix<double, 3> >(0,0);
// cout << fullCov<<endl;
// cout << "RecoVertex/ConstrainedTreeBuilder"<<vtx<<endl;
double ent = 0.;
int charge = 0;
AlgebraicVector7 virtualPartPar;
virtualPartPar(0) = vertex->position().x();
virtualPartPar(1) = vertex->position().y();
virtualPartPar(2) = vertex->position().z();
//making refitted particles out of refitted states.
//none of the operations above violates the order of particles
ROOT::Math::SMatrix<double,7,7,ROOT::Math::MatRepStd<double,7,7> > aMatrix;
ROOT::Math::SMatrix<double,7,7,ROOT::Math::MatRepStd<double,7,7> > aMatrixT;
aMatrix(3,3) = aMatrixT(3,3) = 1;
aMatrix(4,4) = aMatrixT(4,4) = 1;
aMatrix(5,5) = aMatrixT(5,5) = 1;
aMatrix(6,6) = aMatrixT(6,6) = 1;
ROOT::Math::SMatrix<double,7,3,ROOT::Math::MatRepStd<double,7,3> > bMatrix;
ROOT::Math::SMatrix<double,3,7,ROOT::Math::MatRepStd<double,3,7> > bMatrixT;
bMatrix(0,0) = bMatrixT(0,0) = 1;
bMatrix(1,1) = bMatrixT(1,1) = 1;
bMatrix(2,2) = bMatrixT(2,2) = 1;
AlgebraicSymMatrix77 trackParCov;
ROOT::Math::SMatrix<double,3,7,ROOT::Math::MatRepStd<double,3,7> > vtxTrackCov;
AlgebraicSymMatrix77 nCovariance;
// AlgebraicSymMatrix77 tmp;
std::vector<RefCountedKinematicParticle>::const_iterator i = initialParticles.begin();
std::vector<KinematicState>::const_iterator iStates = finalStates.begin();
std::vector<RefCountedKinematicParticle> rParticles;
int n=0;
// assert(initialParticles.size()==nTrk);
for( ; i != initialParticles.end(), iStates != finalStates.end(); ++i,++iStates)
{
AlgebraicVector7 p = iStates->kinematicParameters().vector();
double a = - iStates->particleCharge() *
iStates->magneticField()->inInverseGeV(iStates->globalPosition()).z();
aMatrix(4,0) = aMatrixT(0,4) = -a;
aMatrix(3,1) = aMatrixT(1,3) = a;
bMatrix(4,0) = bMatrixT(0,4) = a;
bMatrix(3,1) = bMatrixT(1,3) = -a;
AlgebraicVector7 par = aMatrix*p + bMatrix * vtx;
trackParCov = fullCov.template Sub<AlgebraicSymMatrix77>(3+n*7,3+n*7);
vtxTrackCov = fullCov.template Sub<ROOT::Math::SMatrix<double, 3, 7> >(0,3+n*7);
ROOT::Math::AssignSym::Evaluate(nCovariance,
aMatrix * trackParCov * aMatrixT
+ aMatrix * ROOT::Math::Transpose(vtxTrackCov) * bMatrixT
+ bMatrix * vtxTrackCov * aMatrixT
+ bMatrix * vertexCov * bMatrixT
);
/*
ROOT::Math::AssignSym::Evaluate(tmp, aMatrix * ROOT::Math::Transpose(vtxTrackCov) * bMatrixT);
nCovariance+=tmp;
ROOT::Math::AssignSym::Evaluate(tmp, bMatrix * vtxTrackCov * aMatrixT);
nCovariance+=tmp;
ROOT::Math::AssignSym::Evaluate(tmp, bMatrix * vertexCov * bMatrixT);
nCovariance+=tmp;
*/
KinematicState stateAtVertex(KinematicParameters(par),
KinematicParametersError(nCovariance),
iStates->particleCharge(), iStates->magneticField());
rParticles.push_back((*i)->refittedParticle(stateAtVertex, vertex->chiSquared(), vertex->degreesOfFreedom()));
virtualPartPar(3) += par(3);
virtualPartPar(4) += par(4);
virtualPartPar(5) += par(5);
ent += sqrt(par(6)*par(6) + par(3)*par(3)+par(4)*par(4)+par(5)*par(5) );
charge += iStates->particleCharge();
++n;
}
//total reconstructed mass
double differ = ent*ent - (virtualPartPar(3)*virtualPartPar(3) + virtualPartPar(5)*virtualPartPar(5) + virtualPartPar(4)*virtualPartPar(4));
if(differ>0.) {
virtualPartPar(6) = sqrt(differ);
} else {
LogDebug("ConstrainedTreeBuilder")
<< "Fit failed: Current precision does not allow to calculate the mass\n";
return ReferenceCountingPointer<KinematicTree>(new KinematicTree());
}
// covariance matrix:
AlgebraicSymMatrix77 cov = this->covarianceMatrix<nTrk>(rParticles,virtualPartPar,fullCov);
KinematicState nState(KinematicParameters(virtualPartPar),
KinematicParametersError(cov),
charge, initialParticles[0]->magneticField());
//newborn kinematic particle
float chi2 = vertex->chiSquared();
float ndf = vertex->degreesOfFreedom();
KinematicParticle * zp = 0;
RefCountedKinematicParticle virtualParticle = pFactory.particle(nState,chi2,ndf,zp);
return buildRealTree(virtualParticle, vertex, rParticles);
}
| AlgebraicSymMatrix77 ConstrainedTreeBuilderT::covarianceMatrix | ( | std::vector< RefCountedKinematicParticle > | rPart, |
| const AlgebraicVector7 & | newPar, | ||
| const ROOT::Math::SMatrix< double, 3+7 *nTrk, 3+7 *nTrk, ROOT::Math::MatRepSym< double, 3+7 *nTrk > > & | fitCov | ||
| ) | [static, private] |
Metod to reconstruct the full covariance matrix of the resulting particle.
Definition at line 184 of file ConstrainedTreeBuilderT.h.
References i, j, run_regression::ret, findQualityFiles::size, mathSSE::sqrt(), and pileupCalc::upper.
{
typedef ROOT::Math::SMatrix<double,3+7*nTrk,3+7*nTrk,ROOT::Math::MatRepSym<double,3+7*nTrk> > FitCov;
//constructing the full matrix using the simple fact
//that we have never broken the order of tracks
// during our fit.
int size = nTrk;
if ( int(rPart.size())!=size) throw "error in ConstrainedTreeBuilderT ";
//global propagation to the vertex position
//Jacobian is done for all the parameters together
ROOT::Math::SMatrix<double,3+7*nTrk> jac;
jac(0,0) = 1;
jac(1,1) = 1;
jac(2,2) = 1;
ROOT::Math::SMatrix<double,3,7> upper;
ROOT::Math::SMatrix<double,7> diagonal;
for( int i_int=0; i_int!=size; ++i_int) {
RefCountedKinematicParticle const & i = rPart[i_int];
//vertex position related components of the matrix
double a_i = - (i)->currentState().particleCharge() *
(i)->magneticField()->inInverseGeV((i)->currentState().globalPosition()).z();
upper(0,0) = 1;
upper(1,1) = 1;
upper(2,2) = 1;
upper(1,3) = -a_i;
upper(0,4) = a_i;
jac.Place_at(upper,0,3+i_int*7);
diagonal(3,3) = 1;
diagonal(4,4) = 1;
diagonal(5,5) = 1;
diagonal(6,6) = 1;
diagonal(1,3) = a_i;
diagonal(0,4) = -a_i;
jac.Place_at(diagonal,3+i_int*7,3+i_int*7);
}
// jacobian is constructed in such a way, that
// right operation for transformation will be
// fitCov.similarityT(jac)
// WARNING: normal similarity operation is
// not valid in this case
//now making reduced matrix:
// int vSize = rPart.size();
FitCov const & fit_cov_sym = fitCov;
/*
for(int i = 0; i<7*vSize+3; ++i)
{
for(int j = 0; j<7*vSize+3; ++j)
{if(i<=j) fit_cov_sym(i,j) = fitCov(i,j);}
}
*/
ROOT::Math::SMatrix<double,4*nTrk+3,4*nTrk+3, ROOT::Math::MatRepSym<double,4*nTrk+3> > reduced;
FitCov transform=ROOT::Math::SimilarityT(jac,fit_cov_sym); // similarityT???
//jacobian to add matrix components
ROOT::Math::SMatrix<double,7,4*nTrk+3> jac_t;
jac_t(0,0) = 1.;
jac_t(1,1) = 1.;
jac_t(2,2) = 1.;
double energy_global = sqrt(newPar(3)*newPar(3)+newPar(4)*newPar(4) + newPar(5)*newPar(5)+newPar(6)*newPar(6));
for(int il_int = 0; il_int!=size; ++il_int) {
RefCountedKinematicParticle const & rs = rPart[il_int];
//jacobian components:
int off1=3; int off2=il_int*4+3;
jac_t(off1+0,off2+0) = 1.;
jac_t(off1+1,off2+1) = 1.;
jac_t(off1+2,off2+2) = 1.;
//non-trival elements: mass correlations:
AlgebraicVector7 l_Par = (rs)->currentState().kinematicParameters().vector();
double energy_local = sqrt(l_Par(6)*l_Par(6) + l_Par(3)*l_Par(3) + l_Par(4)*l_Par(4) + l_Par(5)*l_Par(5));
jac_t(off1+3,off2+3) = energy_global*l_Par(6)/(newPar(6)*energy_local);
jac_t(off1+3,off2+0) = ((energy_global*l_Par(3)/energy_local) - newPar(3))/newPar(6);
jac_t(off1+3,off2+1) = ((energy_global*l_Par(4)/energy_local) - newPar(4))/newPar(6);
jac_t(off1+3,off2+2) = ((energy_global*l_Par(5)/energy_local) - newPar(5))/newPar(6);
}
for(int i = 0; i<7;++i)
for(int j =0; j<7; ++j)
reduced(i,j) = transform(i+3, j+3);
for(int i = 1; i<size; i++) {
//non-trival elements: mass correlations:
//upper row and right column
int off1=0;
int off2=3+4*i;
for(int l1 = 0; l1<3;++l1)
for(int l2 = 0; l2<4;++l2)
reduced(off1+l1,off2+l2) = transform(3+l1,6+7*i +l2);
//diagonal elements
off1=off2=3+4*i;
for(int l1 = 0; l1<4;++l1)
for(int l2 = 0; l2<4;++l2)
reduced(off1+l1,off2+l2) = transform(6+7*i+l1, 6+7*i+l2);
//off diagonal elements
for(int j = 1; j<size; j++) {
off1 = 3+4*(i-1); off2=3+4*j;
for(int l1 = 0; l1<4;++l1)
for(int l2 = 0; l2<4;++l2)
reduced(off1+l1,off2+l2) = transform(6+7*(i-1)+l1,6+7*j+l2);
}
}
AlgebraicSymMatrix77 ret;
ROOT::Math::AssignSym::Evaluate(ret, jac_t*reduced*ROOT::Math::Transpose(jac_t));
return ret;
}
Definition at line 50 of file ConstrainedTreeBuilderT.h.
Referenced by buildTree().
Definition at line 51 of file ConstrainedTreeBuilderT.h.
Referenced by buildRealTree().
1.7.3