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HbbHbb_Component_KinFit.cc
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HbbHbb_Component_KinFit.cc
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#include "PhysicsTools/KinFitter/interface/TFitConstraintM.h"
#include "PhysicsTools/KinFitter/interface/TFitParticleEtEtaPhi.h"
#include "PhysicsTools/KinFitter/interface/TKinFitter.h"
#include "TLorentzVector.h"
#include <iostream>
double ErrpT_Signal(double pT, double eta)
{
double sigmapT=0;
if (fabs(eta)<1.4)
{
if (pT<40) pT=40;
if (pT>550) pT=550;
sigmapT = 22.26 - 0.01*pT + 0.00018*pT*pT;
}
else
{
if (pT<40) pT=40;
if (pT>350) pT=350;
sigmapT = 17.11 + 0.058 * pT;
}
return sigmapT*sigmapT;
}
double ErrEta_Signal(double pT)
{
if (pT<40) pT=40;
if (pT>500) pT=500;
double sigmaEta = 0.033 + (4.1/pT) + (-0.17/pow(pT,0.5));
return sigmaEta*sigmaEta;
}
double ErrPhi_Signal(double pT)
{
if (pT<40) pT=40;
if (pT>500) pT=500;
double sigmaPhi = 0.038 + (4.1/pT) + (-0.19/pow(pT,0.5));
return sigmaPhi*sigmaPhi;
}
TLorentzVector biasEt_signal(TLorentzVector j)
{
double pT=j.Pt();
double eta=j.Eta();
double newpT=-1;
if (fabs(eta)<1.4)
{
newpT = pT - (-17.6 + 0.03*pT + 0.00009*pT*pT);
}
else
{
newpT = pT - (-15.4 - 0.02*pT + 0.0001*pT*pT);
}
TLorentzVector jNew;
jNew.SetPtEtaPhiM(newpT, eta, j.Phi(), j.M());
return jNew;
}
double constrainHH_signalMeasurement(TLorentzVector *j1, TLorentzVector *j2, TLorentzVector *j3, TLorentzVector *j4, double mass1=125, double mass2=125)
{
TMatrixD m1(3,3);
TMatrixD m2(3,3);
TMatrixD m3(3,3);
TMatrixD m4(3,3);
m1.Zero();
m2.Zero();
m3.Zero();
m4.Zero();
m1(0,0) = ErrpT_Signal(j1->Et(), j1->Eta());
m1(1,1) = ErrEta_Signal(j1->Et());
m1(2,2) = ErrPhi_Signal(j1->Et());
m2(0,0) = ErrpT_Signal(j2->Et(), j2->Eta());
m2(1,1) = ErrEta_Signal(j2->Et());
m2(2,2) = ErrPhi_Signal(j2->Et());
m3(0,0) = ErrpT_Signal(j3->Et(), j3->Eta());
m3(1,1) = ErrEta_Signal(j3->Et());
m3(2,2) = ErrPhi_Signal(j3->Et());
m4(0,0) = ErrpT_Signal(j4->Et(), j4->Eta());
m4(1,1) = ErrEta_Signal(j4->Et());
m4(2,2) = ErrPhi_Signal(j4->Et());
// TLorentzVector j1_new=biasEt_signal(*j1);
// TLorentzVector j2_new=biasEt_signal(*j2);
// TLorentzVector j3_new=biasEt_signal(*j3);
// TLorentzVector j4_new=biasEt_signal(*j4);
TFitParticleEtEtaPhi *jet1 = new TFitParticleEtEtaPhi(j1, &m1);
TFitParticleEtEtaPhi *jet2 = new TFitParticleEtEtaPhi(j2, &m2);
TFitParticleEtEtaPhi *jet3 = new TFitParticleEtEtaPhi(j3, &m3);
TFitParticleEtEtaPhi *jet4 = new TFitParticleEtEtaPhi(j4, &m4);
TFitConstraintM *massConstraint1 = new TFitConstraintM("massConstraint1", "massConstraint1", 0, 0, mass1);
massConstraint1->addParticles1(jet1, jet2);
TFitConstraintM *massConstraint2 = new TFitConstraintM("massConstraint2", "massConstraint2", 0, 0, mass2);
massConstraint2->addParticles1(jet3, jet4);
TKinFitter *fitter = new TKinFitter("fitter", "fitter");
fitter->addMeasParticle(jet1);
fitter->addMeasParticle(jet2);
fitter->addMeasParticle(jet3);
fitter->addMeasParticle(jet4);
fitter->addConstraint(massConstraint1);
fitter->addConstraint(massConstraint2);
fitter->setMaxNbIter(30);
fitter->setMaxDeltaS(1e-2);
fitter->setMaxF(1e-1);
fitter->setVerbosity(3);
fitter->fit();
double chi2=fitter->getS();
*j1 = TLorentzVector(*(fitter->get4Vec(0)));
*j2 = TLorentzVector(*(fitter->get4Vec(1)));
*j3 = TLorentzVector(*(fitter->get4Vec(2)));
*j4 = TLorentzVector(*(fitter->get4Vec(3)));
delete jet1;
delete jet2;
delete jet3;
delete jet4;
delete massConstraint1;
delete massConstraint2;
delete fitter;
return chi2;
}
double constrainHH_afterRegression(TLorentzVector *j1, TLorentzVector *j2, TLorentzVector *j3, TLorentzVector *j4, double mass1=125, double mass2=125)
{
TMatrixD m1(3,3);
TMatrixD m2(3,3);
TMatrixD m3(3,3);
TMatrixD m4(3,3);
m1.Zero();
m2.Zero();
m3.Zero();
m4.Zero();
m1(0,0) = ErrpT_Signal(j1->Et(), j1->Eta());
m1(1,1) = ErrEta_Signal(j1->Et());
m1(2,2) = ErrPhi_Signal(j1->Et());
m2(0,0) = ErrpT_Signal(j2->Et(), j2->Eta());
m2(1,1) = ErrEta_Signal(j2->Et());
m2(2,2) = ErrPhi_Signal(j2->Et());
m3(0,0) = ErrpT_Signal(j3->Et(), j3->Eta());
m3(1,1) = ErrEta_Signal(j3->Et());
m3(2,2) = ErrPhi_Signal(j3->Et());
m4(0,0) = ErrpT_Signal(j4->Et(), j4->Eta());
m4(1,1) = ErrEta_Signal(j4->Et());
m4(2,2) = ErrPhi_Signal(j4->Et());
TFitParticleEtEtaPhi *jet1 = new TFitParticleEtEtaPhi(j1, &m1);
TFitParticleEtEtaPhi *jet2 = new TFitParticleEtEtaPhi(j2, &m2);
TFitParticleEtEtaPhi *jet3 = new TFitParticleEtEtaPhi(j3, &m3);
TFitParticleEtEtaPhi *jet4 = new TFitParticleEtEtaPhi(j4, &m4);
TFitConstraintM *massConstraint1 = new TFitConstraintM("massConstraint1", "massConstraint1", 0, 0, mass1);
massConstraint1->addParticles1(jet1, jet2);
TFitConstraintM *massConstraint2 = new TFitConstraintM("massConstraint2", "massConstraint2", 0, 0, mass2);
massConstraint2->addParticles1(jet3, jet4);
TKinFitter *fitter = new TKinFitter("fitter", "fitter");
fitter->addMeasParticle(jet1);
fitter->addMeasParticle(jet2);
fitter->addMeasParticle(jet3);
fitter->addMeasParticle(jet4);
fitter->addConstraint(massConstraint1);
fitter->addConstraint(massConstraint2);
fitter->setMaxNbIter(30);
fitter->setMaxDeltaS(1e-2);
fitter->setMaxF(1e-1);
fitter->setVerbosity(3);
fitter->fit();
double chi2=fitter->getS();
*j1 = TLorentzVector(*(fitter->get4Vec(0)));
*j2 = TLorentzVector(*(fitter->get4Vec(1)));
*j3 = TLorentzVector(*(fitter->get4Vec(2)));
*j4 = TLorentzVector(*(fitter->get4Vec(3)));
delete jet1;
delete jet2;
delete jet3;
delete jet4;
delete massConstraint1;
delete massConstraint2;
delete fitter;
return chi2;
}
double constrainHH_check(TLorentzVector *j1, TLorentzVector *j2, TLorentzVector *j3, TLorentzVector *j4, double mass1=125, double mass2=125)
{
TMatrixD m1(3,3);
TMatrixD m2(3,3);
TMatrixD m3(3,3);
TMatrixD m4(3,3);
m1.Zero();
m2.Zero();
m3.Zero();
m4.Zero();
m1(0,0) = 5;
m1(1,1) = 0.1;
m1(2,2) = 0.1;
m2(0,0) = 5;
m2(1,1) = 0.1;
m2(2,2) = 0.1;
m3(0,0) = 5;
m3(1,1) = 0.1;
m3(2,2) = 0.1;
m4(0,0) = 5;
m4(1,1) = 0.1;
m4(2,2) = 0.1;
TFitParticleEtEtaPhi *jet1 = new TFitParticleEtEtaPhi(j1, &m1);
TFitParticleEtEtaPhi *jet2 = new TFitParticleEtEtaPhi(j2, &m2);
TFitParticleEtEtaPhi *jet3 = new TFitParticleEtEtaPhi(j3, &m3);
TFitParticleEtEtaPhi *jet4 = new TFitParticleEtEtaPhi(j4, &m4);
TFitConstraintM *massConstraint1 = new TFitConstraintM("massConstraint1", "massConstraint1", 0, 0, mass1);
massConstraint1->addParticles1(jet1, jet2);
TFitConstraintM *massConstraint2 = new TFitConstraintM("massConstraint2", "massConstraint2", 0, 0, mass2);
massConstraint2->addParticles1(jet3, jet4);
TKinFitter *fitter = new TKinFitter("fitter", "fitter");
fitter->addMeasParticle(jet1);
fitter->addMeasParticle(jet2);
fitter->addMeasParticle(jet3);
fitter->addMeasParticle(jet4);
fitter->addConstraint(massConstraint1);
fitter->addConstraint(massConstraint2);
fitter->setMaxNbIter(30);
fitter->setMaxDeltaS(1e-2);
fitter->setMaxF(1e-1);
fitter->setVerbosity(3);
fitter->fit();
double chi2=fitter->getS();
*j1 = TLorentzVector(*(fitter->get4Vec(0)));
*j2 = TLorentzVector(*(fitter->get4Vec(1)));
*j3 = TLorentzVector(*(fitter->get4Vec(2)));
*j4 = TLorentzVector(*(fitter->get4Vec(3)));
delete jet1;
delete jet2;
delete jet3;
delete jet4;
delete massConstraint1;
delete massConstraint2;
delete fitter;
return chi2;
}