Belle II Software light-2406-ragdoll
Origin Class Reference

representation of the beamspot as a particle More...

#include <Origin.h>

Inheritance diagram for Origin:
Collaboration diagram for Origin:

Public Types

enum  TFParticleType {
  kInteractionPoint ,
  kOrigin ,
  kComposite ,
  kRecoResonance ,
  kInternalParticle ,
  kRecoTrack ,
  kResonance ,
  kRecoPhoton ,
  kRecoKlong ,
  kMissingParticle
}
 particle types
More...
 
typedef std::vector< Constraintconstraintlist
 alias
 
typedef std::vector< std::pair< const ParticleBase *, int > > indexmap
 alias
 

Public Member Functions

 Origin (Belle2::Particle *particle, const ConstraintConfiguration &config, const bool forceFitAll)
 Constructor.
 
 Origin (Belle2::Particle *daughter)
 Constructor.
 
virtual ~Origin ()
 destructor
 
virtual ErrCode initParticleWithMother (FitParams &fitparams) override
 init particle, used if it has a mother
 
virtual ErrCode initMotherlessParticle (FitParams &fitparams) override
 init particle, used if it has no mother
 
ErrCode initOrigin ()
 init the origin "particle"

 
virtual int dim () const override
 space reserved in fit pars
 
virtual ErrCode initCovariance (FitParams &fitpar) const override
 init covariance matrix of the constraint

 
virtual int type () const override
 get particle type
 
ErrCode projectOriginConstraint (const FitParams &fitpar, Projection &) const
 the actual constraint projection

 
virtual ErrCode projectConstraint (Constraint::Type, const FitParams &, Projection &) const override
 the abstract projection

 
virtual void addToConstraintList (constraintlist &list, int depth) const override
 adds the origin as a particle to the constraint list

 
virtual int posIndex () const override
 vertex position index in the statevector
 
virtual int momIndex () const override
 momentum index in the statevector.
 
virtual int tauIndex () const override
 the lifetime index.
 
virtual bool hasEnergy () const override
 has energy

 
virtual std::string name () const
 get name

 
virtual void updateIndex (int &offset)
 this sets the index for momentum, position, etc.
 
virtual std::string parname (int index) const
 get name of parameter i
 
const ParticleBaselocate (Belle2::Particle *particle) const
 get particle base from basf2 particle
 
Belle2::Particleparticle () const
 get basf2 particle

 
int index () const
 get index

 
const ParticleBasemother () const
 getMother() / hasMother()
 
virtual ErrCode projectGeoConstraint (const FitParams &, Projection &) const
 project geometrical constraint
 
virtual ErrCode projectMassConstraintParticle (const FitParams &, Projection &) const
 project mass constraint using the particles parameters
 
virtual ErrCode projectMassConstraintDaughters (const FitParams &, Projection &) const
 project mass constraint using the parameters of the daughters
 
virtual ErrCode projectMassConstraint (const FitParams &, Projection &) const
 project mass constraint abstract
 
virtual void forceP4Sum (FitParams &) const
 force p4 sum conservation all along the tree
 
virtual bool hasPosition () const
 get false

 
int eneIndex () const
 get energy index

 
virtual double chiSquare (const FitParams &) const
 get chi2
 
int charge () const
 get charge
 
virtual ParticleBaseaddDaughter (Belle2::Particle *, const ConstraintConfiguration &config, bool forceFitAll=false)
 add daughter

 
virtual void removeDaughter (const ParticleBase *pb)
 remove daughter
 
virtual void retrieveIndexMap (indexmap &anindexmap) const
 get index map

 
void setMother (const ParticleBase *m)
 set mother

 
void collectVertexDaughters (std::vector< ParticleBase * > &particles, int posindex)
 get vertex daughters
 
virtual int nFinalChargedCandidates () const
 number of charged candidates
 

Static Public Member Functions

static ParticleBasecreateParticle (Belle2::Particle *particle, const ParticleBase *mother, const ConstraintConfiguration &config, bool forceFitAll=false)
 create the according treeFitter particle obj for a basf2 particle type

 
static ParticleBasecreateOrigin (Belle2::Particle *daughter, const ConstraintConfiguration &config, bool forceFitAll)
 create a custom origin particle or a beamspot
 

Protected Types

typedef std::vector< ParticleBase * > ParticleContainer
 just an alias
 

Protected Member Functions

ErrCode initTau (FitParams &par) const
 initialises tau as a length

 
void setIndex (int i)
 set Index (in statevector)
 

Static Protected Member Functions

static bool isAResonance (Belle2::Particle *particle)
 controls if a particle is treated as a resonance(lifetime=0) or a particle that has a finite lifetime.
 

Protected Attributes

Belle2::Particlem_particle
 pointer to framework type

 
const ParticleBasem_mother
 motherparticle
 
std::vector< ParticleBase * > m_daughters
 daughter container

 
bool m_isStronglyDecayingResonance
 decay length less than 1 micron

 
const ConstraintConfigurationm_config
 has all the constraint config
 

Private Attributes

const int m_constraintDimension
 dimension of the constraint

 
const std::vector< double > m_customOriginVertex
 vertex coordinates
 
const std::vector< double > m_customOriginCovariance
 vertex covariance
 
Eigen::Matrix< double, Eigen::Dynamic, 1, Eigen::ColMajor, 3, 1 > m_posVec
 vertex position of the origin
 
Eigen::Matrix< double, Eigen::Dynamic, Eigen::Dynamic, Eigen::ColMajor, 3, 3 > m_covariance
 covariance of the origin dont know size but I know the max size
 
const bool m_isBeamSpot
 is this the beam constraint?
 
Belle2::DBObjPtr< Belle2::BeamSpotm_beamSpot
 the parameters are initialize elsewhere this is just a pointer to that
 
const int m_inflationFactorCovZ
 inflated the covariance matrix in z by this number
 
int m_index
 index
 
std::string m_name
 name

 

Detailed Description

representation of the beamspot as a particle

Definition at line 19 of file Origin.h.

Member Typedef Documentation

◆ constraintlist

typedef std::vector<Constraint> constraintlist
inherited

alias

Definition at line 52 of file ParticleBase.h.

◆ indexmap

typedef std::vector< std::pair<const ParticleBase*, int> > indexmap
inherited

alias

Definition at line 55 of file ParticleBase.h.

◆ ParticleContainer

typedef std::vector<ParticleBase*> ParticleContainer
protectedinherited

just an alias

Definition at line 178 of file ParticleBase.h.

Member Enumeration Documentation

◆ TFParticleType

enum TFParticleType
inherited

particle types

Definition at line 30 of file ParticleBase.h.

30 {kInteractionPoint,
31 kOrigin,
32 kComposite,
33 kRecoResonance,
34 kInternalParticle,
35 kRecoTrack,
36 kResonance,
37 kRecoPhoton,
38 kRecoKlong,
39 kMissingParticle
40 };

Constructor & Destructor Documentation

◆ Origin()

Origin ( Belle2::Particle particle,
const ConstraintConfiguration config,
const bool  forceFitAll 
)

Constructor.

Definition at line 18 of file Origin.cc.

21 :
22 ParticleBase("Origin"),
23 m_constraintDimension(config.m_originDimension), //this also affects the geometric constraint
24 m_customOriginVertex(config.m_customOriginVertex),
25 m_customOriginCovariance(config.m_customOriginCovariance),
26 m_posVec(config.m_originDimension),
27 m_covariance(config.m_originDimension, config.m_originDimension),
28 m_isBeamSpot(config.m_ipConstraint),
29 m_inflationFactorCovZ(config.m_inflationFactorCovZ)
30 {
31 addDaughter(daughter, config, forceFitAll);
32 initOrigin();
33 }
const int m_constraintDimension
dimension of the constraint
Definition: Origin.h:80
Eigen::Matrix< double, Eigen::Dynamic, Eigen::Dynamic, Eigen::ColMajor, 3, 3 > m_covariance
covariance of the origin dont know size but I know the max size
Definition: Origin.h:94
const std::vector< double > m_customOriginVertex
vertex coordinates
Definition: Origin.h:83
ErrCode initOrigin()
init the origin "particle"
Definition: Origin.cc:54
const std::vector< double > m_customOriginCovariance
vertex covariance
Definition: Origin.h:86
Eigen::Matrix< double, Eigen::Dynamic, 1, Eigen::ColMajor, 3, 1 > m_posVec
vertex position of the origin
Definition: Origin.h:89
const bool m_isBeamSpot
is this the beam constraint?
Definition: Origin.h:97
const int m_inflationFactorCovZ
inflated the covariance matrix in z by this number
Definition: Origin.h:103
virtual ParticleBase * addDaughter(Belle2::Particle *, const ConstraintConfiguration &config, bool forceFitAll=false)
add daughter
Definition: ParticleBase.cc:65
ParticleBase(Belle2::Particle *particle, const ParticleBase *mother, const ConstraintConfiguration *config=nullptr)
default constructor
Definition: ParticleBase.cc:30

◆ ~Origin()

virtual ~Origin ( )
inlinevirtual

destructor

Definition at line 33 of file Origin.h.

33{};

Member Function Documentation

◆ addDaughter()

ParticleBase * addDaughter ( Belle2::Particle cand,
const ConstraintConfiguration config,
bool  forceFitAll = false 
)
virtualinherited

add daughter

Definition at line 65 of file ParticleBase.cc.

66 {
67 auto newDaughter = ParticleBase::createParticle(cand, this, config, forceFitAll);
68 m_daughters.push_back(newDaughter);
69 return m_daughters.back();
70 }
static ParticleBase * createParticle(Belle2::Particle *particle, const ParticleBase *mother, const ConstraintConfiguration &config, bool forceFitAll=false)
create the according treeFitter particle obj for a basf2 particle type
std::vector< ParticleBase * > m_daughters
daughter container
Definition: ParticleBase.h:198

◆ addToConstraintList()

void addToConstraintList ( constraintlist list,
int  depth 
) const
overridevirtual

adds the origin as a particle to the constraint list

Implements ParticleBase.

Definition at line 155 of file Origin.cc.

156 {
157 for (auto daughter : m_daughters) {
158 daughter->addToConstraintList(list, depth - 1);
159 }
160 list.push_back(Constraint(this, Constraint::origin, depth, m_constraintDimension)) ;
161 }

◆ charge()

int charge ( ) const
inlineinherited

get charge

Definition at line 144 of file ParticleBase.h.

145 {
146 if (m_particle->getPDGCode()) {
147 double fltcharge = m_particle->getCharge();
148 return fltcharge < 0 ? int(fltcharge - 0.5) : int(fltcharge + 0.5);
149 } else {
150 return m_particle->getCharge() > 0 ? 1 : (m_particle->getCharge() < 0 ? -1 : 0);
151 }
152 }
int getPDGCode(void) const
Returns PDG code.
Definition: Particle.h:454
double getCharge(void) const
Returns particle charge.
Definition: Particle.cc:622
Belle2::Particle * m_particle
pointer to framework type
Definition: ParticleBase.h:192

◆ chiSquare()

double chiSquare ( const FitParams fitparams) const
virtualinherited

get chi2

Definition at line 231 of file ParticleBase.cc.

232 {
233 double rc = 0;
234 for (auto* daughter : m_daughters) {
235 rc += daughter->chiSquare(fitparams);
236 }
237 return rc;
238 }

◆ collectVertexDaughters()

void collectVertexDaughters ( std::vector< ParticleBase * > &  particles,
int  posindex 
)
inherited

get vertex daughters

Definition at line 156 of file ParticleBase.cc.

157 {
158 if (mother() && mother()->posIndex() == posindex) {
159 particles.push_back(this);
160 }
161
162 for (auto* daughter : m_daughters) {
163 daughter->collectVertexDaughters(particles, posindex);
164 }
165 }
virtual int posIndex() const
get vertex index (in statevector!)
Definition: ParticleBase.h:122
const ParticleBase * mother() const
getMother() / hasMother()
Definition: ParticleBase.h:98

◆ createOrigin()

ParticleBase * createOrigin ( Belle2::Particle daughter,
const ConstraintConfiguration config,
bool  forceFitAll 
)
staticinherited

create a custom origin particle or a beamspot

Definition at line 93 of file ParticleBase.cc.

98 {
99 return new Origin(daughter, config, forceFitAll);
100 }

◆ createParticle()

ParticleBase * createParticle ( Belle2::Particle particle,
const ParticleBase mother,
const ConstraintConfiguration config,
bool  forceFitAll = false 
)
staticinherited

create the according treeFitter particle obj for a basf2 particle type

Definition at line 102 of file ParticleBase.cc.

104 {
105 ParticleBase* rc = nullptr;
106
107 if (!mother) { // If there is no mother, this is the 'head of tree' particle (is never a resonance)
108 rc = new InternalParticle(particle, nullptr, config, forceFitAll);
109 } else if (particle->hasExtraInfo("bremsCorrected") // Has Bremsstrahlungs-recovery
110 && particle->getExtraInfo("bremsCorrected") != 0) { // and gammas are attached
111 rc = new Composite(particle, mother, config, true);
112 // if no gamma is attached, it is treated as a RecoTrack
113 } else if (particle->hasExtraInfo("treeFitterTreatMeAsInvisible")
114 && particle->getExtraInfo("treeFitterTreatMeAsInvisible") == 1) { // dummy particles with invisible flag
115 rc = new RecoResonance(particle, mother, config);
116 } else if (particle->getTrack()) { // external reconstructed track
117 rc = new RecoTrack(particle, mother);
118 } else if (particle->getECLCluster()) { // external reconstructed photon
119 rc = new RecoPhoton(particle, mother);
120 } else if (particle->getKLMCluster()) { // external reconstructed klong
121 rc = new RecoKlong(particle, mother);
122 } else if (particle->getMdstArrayIndex()) { // external composite e.g. V0
123 rc = new InternalParticle(particle, mother, config, forceFitAll);
124 } else { // 'internal' particles
125 if (isAResonance(particle)) {
126 rc = new Resonance(particle, mother, config, forceFitAll);
127 } else {
128 rc = new InternalParticle(particle, mother, config, forceFitAll);
129 }
130 }
131 return rc;
132 }
const KLMCluster * getKLMCluster() const
Returns the pointer to the KLMCluster object that was used to create this Particle (ParticleType == c...
Definition: Particle.cc:926
const Track * getTrack() const
Returns the pointer to the Track object that was used to create this Particle (ParticleType == c_Trac...
Definition: Particle.cc:845
const ECLCluster * getECLCluster() const
Returns the pointer to the ECLCluster object that was used to create this Particle (if ParticleType =...
Definition: Particle.cc:891
bool hasExtraInfo(const std::string &name) const
Return whether the extra info with the given name is set.
Definition: Particle.cc:1266
unsigned getMdstArrayIndex(void) const
Returns 0-based index of MDST store array object (0 for composite particles)
Definition: Particle.h:487
double getExtraInfo(const std::string &name) const
Return given value if set.
Definition: Particle.cc:1289
Belle2::Particle * particle() const
get basf2 particle
Definition: ParticleBase.h:92
static bool isAResonance(Belle2::Particle *particle)
controls if a particle is treated as a resonance(lifetime=0) or a particle that has a finite lifetime...

◆ dim()

virtual int dim ( ) const
inlineoverridevirtual

space reserved in fit pars

Implements ParticleBase.

Definition at line 45 of file Origin.h.

45{ return m_constraintDimension; }

◆ eneIndex()

int eneIndex ( ) const
inlineinherited

get energy index

Definition at line 138 of file ParticleBase.h.

138{ return hasEnergy() ? momIndex() + 3 : -1 ; }
virtual int momIndex() const
get momentum index
Definition: ParticleBase.h:128
virtual bool hasEnergy() const
get momentum dimension
Definition: ParticleBase.h:132

◆ forceP4Sum()

virtual void forceP4Sum ( FitParams ) const
inlinevirtualinherited

force p4 sum conservation all along the tree

Reimplemented in InternalParticle.

Definition at line 116 of file ParticleBase.h.

116{} ;

◆ hasEnergy()

virtual bool hasEnergy ( ) const
inlineoverridevirtual

has energy

Reimplemented from ParticleBase.

Definition at line 72 of file Origin.h.

72{ return false; }

◆ hasPosition()

virtual bool hasPosition ( ) const
inlinevirtualinherited

get false

Reimplemented in Composite, InternalParticle, and Resonance.

Definition at line 135 of file ParticleBase.h.

135{ return false ; }

◆ index()

int index ( ) const
inlineinherited

get index

Definition at line 95 of file ParticleBase.h.

95{ return m_index ; }

◆ initCovariance()

ErrCode initCovariance ( FitParams fitpar) const
overridevirtual

init covariance matrix of the constraint

Reimplemented from ParticleBase.

Definition at line 110 of file Origin.cc.

111 {
112 ErrCode status;
113 const int posindex = posIndex();
114 for (int row = 0; row < m_constraintDimension; ++row) {
115 fitpar.getCovariance()(posindex + row, posindex + row) = 1000 * m_covariance(row, row);
116 }
117 for (auto daughter : m_daughters) {
118 status |= daughter->initCovariance(fitpar);
119 }
120 return status;
121 }
virtual int posIndex() const override
vertex position index in the statevector
Definition: Origin.h:63

◆ initMotherlessParticle()

ErrCode initMotherlessParticle ( FitParams fitparams)
overridevirtual

init particle, used if it has no mother

Implements ParticleBase.

Definition at line 40 of file Origin.cc.

41 {
42 ErrCode status;
43 const int posindex = posIndex();
44 fitparams.getStateVector().segment(posindex, m_constraintDimension) = m_posVec.segment(0, m_constraintDimension);
45
46 for (auto daughter : m_daughters) {
47 status |= daughter->initMotherlessParticle(fitparams);
48 status |= daughter->initParticleWithMother(fitparams);
49 }
50
51 return status;
52 }

◆ initOrigin()

ErrCode initOrigin ( )

init the origin "particle"

Definition at line 54 of file Origin.cc.

55 {
57 m_covariance = Eigen::Matrix<double, 3, 3>::Zero(3, 3);
58 const Belle2::B2Vector3D& vertexVector = m_beamSpot->getIPPosition();
59 const TMatrixDSym& covVertex = m_beamSpot->getCovVertex();
60 m_posVec(0) = vertexVector.X();
61 m_posVec(1) = vertexVector.Y();
62 m_posVec(2) = vertexVector.Z();
63 m_covariance(0, 0) = covVertex(0, 0);
64 m_covariance(1, 1) = covVertex(1, 1);
65 m_covariance(2, 2) = covVertex(2, 2);
66 m_covariance(1, 0) = covVertex(1, 0);
67 m_covariance(2, 0) = covVertex(2, 0);
68 m_covariance(2, 1) = covVertex(2, 1);
69
70 } else if (m_beamSpot && m_isBeamSpot && m_constraintDimension == 2) {
71 m_covariance = Eigen::Matrix<double, 2, 2>::Zero(2, 2);
72 const Belle2::B2Vector3D& vertexVector = m_beamSpot->getIPPosition();
73 const TMatrixDSym& covVertex = m_beamSpot->getCovVertex();
74 m_posVec(0) = vertexVector.X();
75 m_posVec(1) = vertexVector.Y();
76 m_covariance(0, 0) = covVertex(0, 0);
77 m_covariance(1, 1) = covVertex(1, 1);
78 m_covariance(1, 0) = covVertex(1, 0);
79
80 } else if (!m_isBeamSpot && m_constraintDimension == 3) {
81
82 if (!(m_customOriginVertex.size() == 3) || !(m_customOriginCovariance.size() == 9)) {
83 B2FATAL("Incorrect dimension of customOriginVertex or customOriginCovariance. customOriginVertex dim = "
84 << m_customOriginVertex.size() << " customOriginCovariance dim = " << m_customOriginCovariance.size());
85 } else if ((m_customOriginCovariance.at(0) < 0) || (m_customOriginCovariance.at(4) < 0) || (m_customOriginCovariance.at(8) < 0)) {
86 B2WARNING("An element of customOriginCovariance diagonal is smaller than 0.");
87 return ErrCode(ErrCode::Status::badsetup);
88 }
96
97 // all with z
103 } else {
104 B2FATAL("The Origin is nether beamspot nor custom. This is ether a configuration error or no beam parameters were found to build the beam spot.");
105 }
106
107 return ErrCode(ErrCode::Status::success);
108 }
DataType Z() const
access variable Z (= .at(2) without boundary check)
Definition: B2Vector3.h:435
DataType X() const
access variable X (= .at(0) without boundary check)
Definition: B2Vector3.h:431
DataType Y() const
access variable Y (= .at(1) without boundary check)
Definition: B2Vector3.h:433
TMatrixDSym getCovVertex() const
Get the total covariance matrix of theIP position (for compatibility with BeamParameters)
Definition: BeamSpot.h:85
const TVector3 & getIPPosition() const
Get the IP position.
Definition: BeamSpot.h:66
Belle2::DBObjPtr< Belle2::BeamSpot > m_beamSpot
the parameters are initialize elsewhere this is just a pointer to that
Definition: Origin.h:100

◆ initParticleWithMother()

ErrCode initParticleWithMother ( FitParams fitparams)
overridevirtual

init particle, used if it has a mother

Implements ParticleBase.

Definition at line 35 of file Origin.cc.

36 {
37 return ErrCode(ErrCode::Status::success);
38 }

◆ initTau()

ErrCode initTau ( FitParams par) const
protectedinherited

initialises tau as a length

Definition at line 426 of file ParticleBase.cc.

427 {
428 const int tauindex = tauIndex();
429 if (tauindex >= 0 && hasPosition()) {
430
431 const int posindex = posIndex();
432 const int mother_ps_index = mother()->posIndex();
433 const int dim = m_config->m_originDimension; // TODO can we configure this to be particle specific?
434
435 // tau has different meaning depending on the dimension of the constraint
436 // 2-> use x-y projection
437 const Eigen::Matrix < double, 1, -1, 1, 1, 3 > vertex_dist =
438 fitparams.getStateVector().segment(posindex, dim) - fitparams.getStateVector().segment(mother_ps_index, dim);
439 const Eigen::Matrix < double, 1, -1, 1, 1, 3 >
440 mom = fitparams.getStateVector().segment(posindex, dim) - fitparams.getStateVector().segment(mother_ps_index, dim);
441
442 // if an intermediate vertex is not well defined by a track or so it will be initialised with 0
443 // same for the momentum of for example B0, it might be initialised with 0
444 // in those cases use pdg value
445 const double mom_norm = mom.norm();
446 const double dot = std::abs(vertex_dist.dot(mom));
447 const double tau = dot / mom_norm;
448 if (0 == mom_norm || 0 == dot) {
449 const double mass = m_particle->getPDGMass();
450 if (mass > 0)
451 fitparams.getStateVector()(tauindex) = m_particle->getPDGLifetime() * 1e9 * Belle2::Const::speedOfLight / mass;
452 else
453 fitparams.getStateVector()(tauindex) = 0;
454 } else {
455 fitparams.getStateVector()(tauindex) = tau;
456 }
457 }
458
459 return ErrCode(ErrCode::Status::success);
460 }
static const double speedOfLight
[cm/ns]
Definition: Const.h:695
double getPDGMass(void) const
Returns uncertainty on the invariant mass (requires valid momentum error matrix)
Definition: Particle.cc:604
double getPDGLifetime() const
Returns particle nominal lifetime.
Definition: Particle.cc:613
const int m_originDimension
dimension of the origin constraint and ALL geometric gcosntraints
virtual int dim() const =0
get dimension of constraint
const ConstraintConfiguration * m_config
has all the constraint config
Definition: ParticleBase.h:204
virtual int tauIndex() const
get tau index
Definition: ParticleBase.h:125
virtual bool hasPosition() const
get false
Definition: ParticleBase.h:135

◆ isAResonance()

bool isAResonance ( Belle2::Particle particle)
staticprotectedinherited

controls if a particle is treated as a resonance(lifetime=0) or a particle that has a finite lifetime.

A finite life time means it will register a geo constraint for this particle

Definition at line 134 of file ParticleBase.cc.

135 {
136 bool rc = false ;
137 const int pdgcode = std::abs(particle->getPDGCode());
138
139 if (pdgcode && !(particle->getMdstArrayIndex())) {
140 switch (pdgcode) {
141 case 22: //photon conversion
142 rc = false;
143 break ;
144
145 case -11: //bremsstrahlung
146 case 11:
147 rc = true ;
148 break ;
149 default: //everything with boosted flight length less than 1 micrometer
150 rc = (pdgcode && particle->getPDGLifetime() < 1e-14);
151 }
152 }
153 return rc ;
154 }

◆ locate()

const ParticleBase * locate ( Belle2::Particle particle) const
inherited

get particle base from basf2 particle

Definition at line 211 of file ParticleBase.cc.

212 {
213 const ParticleBase* rc = (m_particle == particle) ? this : nullptr;
214 if (!rc) {
215 for (auto* daughter : m_daughters) {
216 rc = daughter->locate(particle);
217 if (rc) {break;}
218 }
219 }
220 return rc;
221 }

◆ momIndex()

virtual int momIndex ( ) const
inlineoverridevirtual

momentum index in the statevector.

no value for beamspot as a particle

Reimplemented from ParticleBase.

Definition at line 66 of file Origin.h.

66{ return -1; }

◆ mother()

const ParticleBase * mother ( ) const
inlineinherited

getMother() / hasMother()

Definition at line 98 of file ParticleBase.h.

98{ return m_mother; };
const ParticleBase * m_mother
motherparticle
Definition: ParticleBase.h:195

◆ name()

virtual std::string name ( ) const
inlinevirtual

get name

Definition at line 75 of file Origin.h.

75{ return "Origin"; }

◆ nFinalChargedCandidates()

int nFinalChargedCandidates ( ) const
virtualinherited

number of charged candidates

Reimplemented in RecoTrack.

Definition at line 240 of file ParticleBase.cc.

241 {
242 int rc = 0;
243 for (auto* daughter : m_daughters) {
244 rc += daughter->nFinalChargedCandidates();
245 }
246 return rc;
247 }

◆ parname()

std::string parname ( int  index) const
virtualinherited

get name of parameter i

Reimplemented in InternalParticle, RecoParticle, RecoResonance, and Resonance.

Definition at line 194 of file ParticleBase.cc.

195 {
196 std::string rc = m_name;
197 switch (thisindex) {
198 case 0: rc += "_x "; break;
199 case 1: rc += "_y "; break;
200 case 2: rc += "_z "; break;
201 case 3: rc += "_tau"; break;
202 case 4: rc += "_px "; break;
203 case 5: rc += "_py "; break;
204 case 6: rc += "_pz "; break;
205 case 7: rc += "_E "; break;
206 default:;
207 }
208 return rc;
209 }
std::string m_name
name
Definition: ParticleBase.h:211

◆ particle()

Belle2::Particle * particle ( ) const
inlineinherited

get basf2 particle

Definition at line 92 of file ParticleBase.h.

92{ return m_particle ; }

◆ posIndex()

virtual int posIndex ( ) const
inlineoverridevirtual

vertex position index in the statevector

Reimplemented from ParticleBase.

Definition at line 63 of file Origin.h.

63{ return index(); }
int index() const
get index
Definition: ParticleBase.h:95

◆ projectConstraint()

ErrCode projectConstraint ( Constraint::Type  type,
const FitParams fitparams,
Projection p 
) const
overridevirtual

the abstract projection

Reimplemented from ParticleBase.

Definition at line 142 of file Origin.cc.

143 {
144 ErrCode status;
145 switch (type) {
146 case Constraint::origin:
147 status |= projectOriginConstraint(fitparams, p);
148 break;
149 default:
150 status |= ParticleBase::projectConstraint(type, fitparams, p);
151 }
152 return status;
153 }
ErrCode projectOriginConstraint(const FitParams &fitpar, Projection &) const
the actual constraint projection
Definition: Origin.cc:123
virtual int type() const override
get particle type
Definition: Origin.h:51
virtual ErrCode projectConstraint(Constraint::Type, const FitParams &, Projection &) const
project constraint.

◆ projectGeoConstraint()

ErrCode projectGeoConstraint ( const FitParams fitparams,
Projection p 
) const
virtualinherited

project geometrical constraint

the direction of the momentum is very well known from the kinematic constraints that is why we do not extract the distance as a vector here

Definition at line 249 of file ParticleBase.cc.

250 {
251 assert(m_config);
252 // only allow 2d for head of tree particles that are beam constrained
253 const int dim = m_config->m_originDimension == 2 && std::abs(m_particle->getPDGCode()) == m_config->m_headOfTreePDG ? 2 : 3;
254 const int posindexmother = mother()->posIndex();
255 const int posindex = posIndex();
256 const int tauindex = tauIndex();
257 const int momindex = momIndex();
258
259 const double tau = fitparams.getStateVector()(tauindex);
260 Eigen::Matrix < double, 1, -1, 1, 1, 3 > x_vec = fitparams.getStateVector().segment(posindex, dim);
261 Eigen::Matrix < double, 1, -1, 1, 1, 3 > x_m = fitparams.getStateVector().segment(posindexmother, dim);
262 Eigen::Matrix < double, 1, -1, 1, 1, 3 > p_vec = fitparams.getStateVector().segment(momindex, dim);
263 const double mom = p_vec.norm();
264 const double mom3 = mom * mom * mom;
265
266 if (3 == dim) {
267 // we can already set these
268 //diagonal momentum
269 p.getH()(0, momindex) = tau * (p_vec(1) * p_vec(1) + p_vec(2) * p_vec(2)) / mom3 ;
270 p.getH()(1, momindex + 1) = tau * (p_vec(0) * p_vec(0) + p_vec(2) * p_vec(2)) / mom3 ;
271 p.getH()(2, momindex + 2) = tau * (p_vec(0) * p_vec(0) + p_vec(1) * p_vec(1)) / mom3 ;
272
273 //offdiagonal momentum
274 p.getH()(0, momindex + 1) = - tau * p_vec(0) * p_vec(1) / mom3 ;
275 p.getH()(0, momindex + 2) = - tau * p_vec(0) * p_vec(2) / mom3 ;
276
277 p.getH()(1, momindex + 0) = - tau * p_vec(1) * p_vec(0) / mom3 ;
278 p.getH()(1, momindex + 2) = - tau * p_vec(1) * p_vec(2) / mom3 ;
279
280 p.getH()(2, momindex + 0) = - tau * p_vec(2) * p_vec(0) / mom3 ;
281 p.getH()(2, momindex + 1) = - tau * p_vec(2) * p_vec(1) / mom3 ;
282
283 } else if (2 == dim) {
284
285 // NOTE THAT THESE ARE DIFFERENT IN 2d
286 p.getH()(0, momindex) = tau * (p_vec(1) * p_vec(1)) / mom3 ;
287 p.getH()(1, momindex + 1) = tau * (p_vec(0) * p_vec(0)) / mom3 ;
288
289 //offdiagonal momentum
290 p.getH()(0, momindex + 1) = - tau * p_vec(0) * p_vec(1) / mom3 ;
291 p.getH()(1, momindex + 0) = - tau * p_vec(1) * p_vec(0) / mom3 ;
292 } else {
293 B2FATAL("Dimension of Geometric constraint is not 2 or 3. This will crash many things. You should feel bad.");
294 }
295
296 for (int row = 0; row < dim; ++row) {
297
298 double posxmother = x_m(row);
299 double posx = x_vec(row);
300 double momx = p_vec(row);
301
305 p.getResiduals()(row) = posxmother + tau * momx / mom - posx ;
306 p.getH()(row, posindexmother + row) = 1;
307 p.getH()(row, posindex + row) = -1;
308 p.getH()(row, tauindex) = momx / mom;
309 }
310
311 return ErrCode(ErrCode::Status::success);
312 }
int m_headOfTreePDG
PDG code of the head particle.

◆ projectMassConstraint()

ErrCode projectMassConstraint ( const FitParams fitparams,
Projection p 
) const
virtualinherited

project mass constraint abstract

Definition at line 405 of file ParticleBase.cc.

407 {
408 assert(m_config);
409 if (m_config->m_massConstraintType == 0) {
410 return projectMassConstraintParticle(fitparams, p);
411 } else {
412 return projectMassConstraintDaughters(fitparams, p);
413 }
414 }
const bool m_massConstraintType
const flag for the type of the mass constraint
virtual ErrCode projectMassConstraintParticle(const FitParams &, Projection &) const
project mass constraint using the particles parameters
virtual ErrCode projectMassConstraintDaughters(const FitParams &, Projection &) const
project mass constraint using the parameters of the daughters

◆ projectMassConstraintDaughters()

ErrCode projectMassConstraintDaughters ( const FitParams fitparams,
Projection p 
) const
virtualinherited

project mass constraint using the parameters of the daughters

be aware that the signs here are important E-|p|-m extracts a negative mass and messes with the momentum !

Definition at line 314 of file ParticleBase.cc.

316 {
317 const double mass = particle()->getPDGMass();
318 const double mass2 = mass * mass;
319 double px = 0;
320 double py = 0;
321 double pz = 0;
322 double E = 0;
323
324 // the parameters of the daughters must be used otherwise the mass constraint does not have an effect on the extracted daughter momenta
325 for (const auto* daughter : m_daughters) {
326 const int momindex = daughter->momIndex();
327 // in most cases the daughters will be final states so we cache the value to use it in the energy column
328 const double px_daughter = fitparams.getStateVector()(momindex);
329 const double py_daughter = fitparams.getStateVector()(momindex + 1);
330 const double pz_daughter = fitparams.getStateVector()(momindex + 2);
331
332 px += px_daughter;
333 py += py_daughter;
334 pz += pz_daughter;
335 if (daughter->hasEnergy()) {
336 E += fitparams.getStateVector()(momindex + 3);
337 } else {
338 // final states dont have an energy index
339 const double m = daughter->particle()->getPDGMass();
340 E += std::sqrt(m * m + px_daughter * px_daughter + py_daughter * py_daughter + pz_daughter * pz_daughter);
341 }
342 }
343
347 p.getResiduals()(0) = mass2 - E * E + px * px + py * py + pz * pz;
348
349 for (const auto* daughter : m_daughters) {
350 //dr/dx = d/dx m2-{E1+E2+...}^2+{p1+p2+...}^2 = 2*x (x= E or p)
351 const int momindex = daughter->momIndex();
352 p.getH()(0, momindex) = 2.0 * px;
353 p.getH()(0, momindex + 1) = 2.0 * py;
354 p.getH()(0, momindex + 2) = 2.0 * pz;
355
356 if (daughter->hasEnergy()) {
357 p.getH()(0, momindex + 3) = -2.0 * E;
358 } else {
359 const double px_daughter = fitparams.getStateVector()(momindex);
360 const double py_daughter = fitparams.getStateVector()(momindex + 1);
361 const double pz_daughter = fitparams.getStateVector()(momindex + 2);
362 const double m = daughter->particle()->getPDGMass();
363
364 const double E_daughter = std::sqrt(m * m + px_daughter * px_daughter + py_daughter * py_daughter + pz_daughter * pz_daughter);
365 const double E_by_E_daughter = E / E_daughter;
366 p.getH()(0, momindex) -= 2.0 * E_by_E_daughter * px_daughter;
367 p.getH()(0, momindex + 1) -= 2.0 * E_by_E_daughter * py_daughter;
368 p.getH()(0, momindex + 2) -= 2.0 * E_by_E_daughter * pz_daughter;
369 }
370
371 }
372 return ErrCode(ErrCode::Status::success);
373 }

◆ projectMassConstraintParticle()

ErrCode projectMassConstraintParticle ( const FitParams fitparams,
Projection p 
) const
virtualinherited

project mass constraint using the particles parameters

be aware that the signs here are important E-|p|-m extracts a negative mass and messes with the momentum !

Definition at line 375 of file ParticleBase.cc.

377 {
378 const double mass = particle()->getPDGMass();
379 const double mass2 = mass * mass;
380 const int momindex = momIndex();
381 const double px = fitparams.getStateVector()(momindex);
382 const double py = fitparams.getStateVector()(momindex + 1);
383 const double pz = fitparams.getStateVector()(momindex + 2);
384 const double E = fitparams.getStateVector()(momindex + 3);
385
389 p.getResiduals()(0) = mass2 - E * E + px * px + py * py + pz * pz;
390
391 p.getH()(0, momindex) = 2.0 * px;
392 p.getH()(0, momindex + 1) = 2.0 * py;
393 p.getH()(0, momindex + 2) = 2.0 * pz;
394 p.getH()(0, momindex + 3) = -2.0 * E;
395
396 // TODO 0 in most cases -> needs special treatment if width=0 to not crash chi2 calculation
397 // const double width = TDatabasePDG::Instance()->GetParticle(particle()->getPDGCode())->Width();
398 // transport measurement uncertainty into residual system
399 // f' = sigma_x^2 * (df/dx)^2
400 // p.getV()(0) = width * width * 4 * mass2;
401
402 return ErrCode(ErrCode::Status::success);
403 }

◆ projectOriginConstraint()

ErrCode projectOriginConstraint ( const FitParams fitpar,
Projection p 
) const

the actual constraint projection

Definition at line 123 of file Origin.cc.

124 {
125 const int posindex = posIndex();
126
127 p.getResiduals().segment(0, m_constraintDimension) =
128 m_posVec.segment(0, m_constraintDimension) -
129 fitparams.getStateVector().segment(posindex, m_constraintDimension);
130
131 for (int row = 0; row < m_constraintDimension; ++row) {
132 p.getH()(row, posindex + row) = -1;
133
134 for (int col = 0; col <= row; ++col) {
135 p.getV()(row, col) = m_covariance(row, col);
136 }
137 }
138
139 return ErrCode(ErrCode::Status::success);
140 }

◆ removeDaughter()

void removeDaughter ( const ParticleBase pb)
virtualinherited

remove daughter

Definition at line 73 of file ParticleBase.cc.

74 {
75 auto iter = std::find(m_daughters.begin(), m_daughters.end(), pb);
76 if (iter != m_daughters.end()) {
77 delete *iter;
78 m_daughters.erase(iter);
79 } else {
80 B2ERROR("Cannot remove particle, because not found ...");
81 }
82 }

◆ retrieveIndexMap()

void retrieveIndexMap ( indexmap anindexmap) const
virtualinherited

get index map

Definition at line 223 of file ParticleBase.cc.

224 {
225 map.push_back(std::pair<const ParticleBase*, int>(this, index()));
226 for (auto* daughter : m_daughters) {
227 daughter->retrieveIndexMap(map);
228 }
229 }

◆ setIndex()

void setIndex ( int  i)
inlineprotectedinherited

set Index (in statevector)

Definition at line 189 of file ParticleBase.h.

189{ m_index = i ; }

◆ setMother()

void setMother ( const ParticleBase m)
inlineinherited

set mother

Definition at line 164 of file ParticleBase.h.

164{ m_mother = m ; }

◆ tauIndex()

virtual int tauIndex ( ) const
inlineoverridevirtual

the lifetime index.

the origin does not have a lifetime

Reimplemented from ParticleBase.

Definition at line 69 of file Origin.h.

69{ return -1; }

◆ type()

virtual int type ( ) const
inlineoverridevirtual

get particle type

Implements ParticleBase.

Definition at line 51 of file Origin.h.

51{ return kOrigin; }

◆ updateIndex()

void updateIndex ( int &  offset)
virtualinherited

this sets the index for momentum, position, etc.

in the statevector

Definition at line 84 of file ParticleBase.cc.

85 {
86 for (auto* daughter : m_daughters) {
87 daughter->updateIndex(offset);
88 }
89 m_index = offset;
90 offset += dim();
91 }

Member Data Documentation

◆ m_beamSpot

Belle2::DBObjPtr<Belle2::BeamSpot> m_beamSpot
private

the parameters are initialize elsewhere this is just a pointer to that

Definition at line 100 of file Origin.h.

◆ m_config

const ConstraintConfiguration* m_config
protectedinherited

has all the constraint config

Definition at line 204 of file ParticleBase.h.

◆ m_constraintDimension

const int m_constraintDimension
private

dimension of the constraint

Definition at line 80 of file Origin.h.

◆ m_covariance

Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::ColMajor, 3, 3> m_covariance
private

covariance of the origin dont know size but I know the max size

Definition at line 94 of file Origin.h.

◆ m_customOriginCovariance

const std::vector<double> m_customOriginCovariance
private

vertex covariance

Definition at line 86 of file Origin.h.

◆ m_customOriginVertex

const std::vector<double> m_customOriginVertex
private

vertex coordinates

Definition at line 83 of file Origin.h.

◆ m_daughters

std::vector<ParticleBase*> m_daughters
protectedinherited

daughter container

Definition at line 198 of file ParticleBase.h.

◆ m_index

int m_index
privateinherited

index

Definition at line 208 of file ParticleBase.h.

◆ m_inflationFactorCovZ

const int m_inflationFactorCovZ
private

inflated the covariance matrix in z by this number

Definition at line 103 of file Origin.h.

◆ m_isBeamSpot

const bool m_isBeamSpot
private

is this the beam constraint?

Definition at line 97 of file Origin.h.

◆ m_isStronglyDecayingResonance

bool m_isStronglyDecayingResonance
protectedinherited

decay length less than 1 micron

Definition at line 201 of file ParticleBase.h.

◆ m_mother

const ParticleBase* m_mother
protectedinherited

motherparticle

Definition at line 195 of file ParticleBase.h.

◆ m_name

std::string m_name
privateinherited

name

Definition at line 211 of file ParticleBase.h.

◆ m_particle

Belle2::Particle* m_particle
protectedinherited

pointer to framework type

Definition at line 192 of file ParticleBase.h.

◆ m_posVec

Eigen::Matrix<double, Eigen::Dynamic, 1, Eigen::ColMajor, 3, 1> m_posVec
private

vertex position of the origin

Definition at line 89 of file Origin.h.


The documentation for this class was generated from the following files: