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#include <ConstrainedTreeBuilder.h>
Public Member Functions | |
| RefCountedKinematicTree | buildTree (const std::vector< RefCountedKinematicParticle > &initialParticles, const std::vector< KinematicState > &finalStates, const RefCountedKinematicVertex vtx, const AlgebraicMatrix &fCov) const |
| ConstrainedTreeBuilder () | |
| ~ConstrainedTreeBuilder () | |
Private Member Functions | |
| RefCountedKinematicTree | buildTree (const RefCountedKinematicParticle virtualParticle, const RefCountedKinematicVertex vtx, const std::vector< RefCountedKinematicParticle > &particles) const |
| AlgebraicMatrix | covarianceMatrix (std::vector< RefCountedKinematicParticle > rPart, const AlgebraicVector7 &newPar, const AlgebraicMatrix &fitCov) const |
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 ConstrainedTreeBuilder.h.
| ConstrainedTreeBuilder::ConstrainedTreeBuilder | ( | ) |
Definition at line 5 of file ConstrainedTreeBuilder.cc.
References pFactory, and vFactory.
{
pFactory = new VirtualKinematicParticleFactory();
vFactory = new KinematicVertexFactory();
}
| ConstrainedTreeBuilder::~ConstrainedTreeBuilder | ( | ) |
| RefCountedKinematicTree ConstrainedTreeBuilder::buildTree | ( | const std::vector< RefCountedKinematicParticle > & | initialParticles, |
| const std::vector< KinematicState > & | finalStates, | ||
| const RefCountedKinematicVertex | vtx, | ||
| const AlgebraicMatrix & | fCov | ||
| ) | const |
Method constructing tree out of set of refitted states, vertex, and full covariance matrix.
Definition at line 18 of file ConstrainedTreeBuilder.cc.
References a, DeDxDiscriminatorTools::charge(), covarianceMatrix(), i, LogDebug, n, AlCaHLTBitMon_ParallelJobs::p, VirtualKinematicParticleFactory::particle(), pFactory, mathSSE::sqrt(), and z.
Referenced by KinematicConstrainedVertexFitter::fit().
{
if (!vertex->vertexIsValid()) {
LogDebug("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 = asSMatrix<3,3>(fullCov.sub(1,3,1,3));
// 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;
aMatrix(3,3) = 1;
aMatrix(4,4) = 1;
aMatrix(5,5) = 1;
aMatrix(6,6) = 1;
ROOT::Math::SMatrix<double,7,3,ROOT::Math::MatRepStd<double,7,3> > bMatrix;
bMatrix(0,0) = 1;
bMatrix(1,1) = 1;
bMatrix(2,2) = 1;
AlgebraicMatrix77 trackParCov;
ROOT::Math::SMatrix<double,3,7,ROOT::Math::MatRepStd<double,3,7> > vtxTrackCov;
AlgebraicMatrix77 nCovariance;
std::vector<RefCountedKinematicParticle>::const_iterator i = initialParticles.begin();
std::vector<KinematicState>::const_iterator iStates = finalStates.begin();
std::vector<RefCountedKinematicParticle> rParticles;
int n=0;
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) = -a;
aMatrix(3,1) = a;
bMatrix(4,0) = a;
bMatrix(3,1) = -a;
AlgebraicVector7 par = aMatrix*p + bMatrix * vtx;
trackParCov = asSMatrix<7,7>(fullCov.sub(4+n*7,10+n*7,4+n*7,10+n*7));
vtxTrackCov = asSMatrix<3,7>(fullCov.sub(1,3,4+n*7,10+n*7));;
nCovariance = aMatrix * trackParCov * ROOT::Math::Transpose(aMatrix) +
aMatrix * ROOT::Math::Transpose(vtxTrackCov) * ROOT::Math::Transpose(bMatrix) +
bMatrix * vtxTrackCov * ROOT::Math::Transpose(aMatrix)+
bMatrix * vertexCov * ROOT::Math::Transpose(bMatrix);
KinematicState stateAtVertex(KinematicParameters(par),
KinematicParametersError(AlgebraicSymMatrix77(nCovariance.LowerBlock())),
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:
AlgebraicMatrix77 cov = asSMatrix<7,7>(covarianceMatrix(rParticles,virtualPartPar,fullCov));
KinematicState nState(KinematicParameters(virtualPartPar),
KinematicParametersError(AlgebraicSymMatrix77(cov.LowerBlock())),
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 buildTree(virtualParticle, vertex, rParticles);
}
| RefCountedKinematicTree ConstrainedTreeBuilder::buildTree | ( | const RefCountedKinematicParticle | virtualParticle, |
| const RefCountedKinematicVertex | vtx, | ||
| const std::vector< RefCountedKinematicParticle > & | particles | ||
| ) | const [private] |
Definition at line 126 of file ConstrainedTreeBuilder.cc.
References KinematicTree::movePointerToTheTop(), KinematicTree::replaceCurrentParticle(), diffTreeTool::tree, KinematicVertexFactory::vertex(), and vFactory.
{
//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;
}
| AlgebraicMatrix ConstrainedTreeBuilder::covarianceMatrix | ( | std::vector< RefCountedKinematicParticle > | rPart, |
| const AlgebraicVector7 & | newPar, | ||
| const AlgebraicMatrix & | fitCov | ||
| ) | const [private] |
Metod to reconstructing the full covariance matrix of the resulting particle.
Definition at line 155 of file ConstrainedTreeBuilder.cc.
References i, j, findQualityFiles::size, mathSSE::sqrt(), pileupCalc::upper, and z.
Referenced by buildTree().
{
//constructing the full matrix using the simple fact
//that we have never broken the order of tracks
// during our fit.
int size = rPart.size();
//global propagation to the vertex position
//Jacobian is done for all the parameters together
AlgebraicMatrix jac(3+7*size,3+7*size,0);
jac(1,1) = 1;
jac(2,2) = 1;
jac(3,3) = 1;
int i_int=0;
for(std::vector<RefCountedKinematicParticle>::iterator i = rPart.begin(); i != rPart.end(); i++)
{
//vertex position related components of the matrix
double a_i = - (*i)->currentState().particleCharge() * (*i)->magneticField()->inInverseGeV((*i)->currentState().globalPosition()).z();
AlgebraicMatrix upper(3,7,0);
AlgebraicMatrix diagonal(7,7,0);
upper(1,1) = 1;
upper(2,2) = 1;
upper(3,3) = 1;
upper(2,4) = -a_i;
upper(1,5) = a_i;
jac.sub(1,4+i_int*7,upper);
diagonal(4,4) = 1;
diagonal(5,5) = 1;
diagonal(6,6) = 1;
diagonal(7,7) = 1;
diagonal(2,4) = a_i;
diagonal(1,5) = -a_i;
jac.sub(4+i_int*7,4+i_int*7,diagonal);
i_int++;
}
// 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();
AlgebraicSymMatrix fit_cov_sym(7*vSize+3,0);
for(int i = 1; i<7*vSize+4; ++i)
{
for(int j = 1; j<7*vSize+4; ++j)
{if(i<=j) fit_cov_sym(i,j) = fitCov(i,j);}
}
AlgebraicMatrix reduced(3+4*size,3+4*size,0);
AlgebraicMatrix transform = fit_cov_sym.similarityT(jac);
//jacobian to add matrix components
AlgebraicMatrix jac_t(7,7+4*(size-1));
jac_t(1,1) = 1.;
jac_t(2,2) = 1.;
jac_t(3,3) = 1.;
//debug code:
//CLHEP bugs: avoiding the
// HepMatrix::sub method use
AlgebraicMatrix reduced_tm(7,7,0);
for(int i = 1; i<8;++i)
{
for(int j =1; j<8; ++j)
{reduced_tm(i,j) = transform(i+3, j+3);}
}
//left top corner
// reduced.sub(1,1,transform.sub(4,10,4,10));
//debug code:
//CLHEP bugs: avoiding the
// HepMatrix::sub method use
reduced.sub(1,1,reduced_tm);
// cout<<"reduced matrix"<<reduced<<endl;
int il_int = 0;
double energy_global = sqrt(newPar(3)*newPar(3)+newPar(4)*newPar(4) + newPar(5)*newPar(5)+newPar(6)*newPar(6));
for(std::vector<RefCountedKinematicParticle>::const_iterator rs = rPart.begin();
rs!=rPart.end();rs++)
{
//jacobian components:
AlgebraicMatrix jc_el(4,4,0);
jc_el(1,1) = 1.;
jc_el(2,2) = 1.;
jc_el(3,3) = 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));
jc_el(4,4) = energy_global*l_Par(6)/(newPar(6)*energy_local);
jc_el(4,1) = ((energy_global*l_Par(3)/energy_local) - newPar(3))/newPar(6);
jc_el(4,2) = ((energy_global*l_Par(4)/energy_local) - newPar(4))/newPar(6);
jc_el(4,3) = ((energy_global*l_Par(5)/energy_local) - newPar(5))/newPar(6);
jac_t.sub(4,il_int*4+4,jc_el);
il_int++;
}
// cout<<"jac_t"<<jac_t<<endl;
//debug code
//CLHEP bugs workaround
// cout<<"Transform matrix"<< transform<<endl;
for(int i = 1; i<size; i++)
{
//non-trival elements: mass correlations:
//upper row and right column
AlgebraicMatrix transform_sub1(3,4,0);
AlgebraicMatrix transform_sub2(4,3,0);
for(int l1 = 1; l1<4;++l1)
{
for(int l2 = 1; l2<5;++l2)
{transform_sub1(l1,l2) = transform(3+l1,6+7*i +l2);}
}
for(int l1 = 1; l1<5;++l1)
{
for(int l2 = 1; l2<4;++l2)
{transform_sub2(l1,l2) = transform(6+7*i+l1,3+l2);}
}
AlgebraicMatrix transform_sub3(4,4,0);
for(int l1 = 1; l1<5;++l1)
{
for(int l2 = 1; l2<5;++l2)
{transform_sub3(l1,l2) = transform(6+7*i+l1, 6+7*i+l2); }
}
reduced.sub(1,4+4*i,transform_sub1);
reduced.sub(4+4*i,1,transform_sub2);
//diagonal elements
reduced.sub(4+4*i,4+4*i,transform_sub3);
//off diagonal elements
for(int j = 1; j<size; j++)
{
AlgebraicMatrix transform_sub4(4,4,0);
AlgebraicMatrix transform_sub5(4,4,0);
for(int l1 = 1; l1<5;++l1)
{
for(int l2 = 1; l2<5;++l2)
{
transform_sub4(l1,l2) = transform(6+7*(i-1)+l1,6+7*j+l2);
transform_sub5(l1,l2) = transform(6+7*j+l1, 6+7*(i-1)+l2);
}
}
reduced.sub(4+4*(i-1),4+4*j,transform_sub4);
reduced.sub(4+4*j,4+4*(i-1),transform_sub5);
}
}
return jac_t*reduced*jac_t.T();
}
Definition at line 45 of file ConstrainedTreeBuilder.h.
Referenced by buildTree(), ConstrainedTreeBuilder(), and ~ConstrainedTreeBuilder().
Definition at line 46 of file ConstrainedTreeBuilder.h.
Referenced by buildTree(), ConstrainedTreeBuilder(), and ~ConstrainedTreeBuilder().
1.7.3