Belle II Software light-2406-ragdoll
RecoResonance Class Reference

A class for resonances. More...

#include <RecoResonance.h>

Inheritance diagram for RecoResonance:
Collaboration diagram for RecoResonance:

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

 RecoResonance (Belle2::Particle *bc, const ParticleBase *mother, const ConstraintConfiguration &config)
 constructor
 
virtual ErrCode initParticleWithMother (FitParams &fitparams) override
 init particle in case it has a mother
 
virtual ErrCode initMotherlessParticle (FitParams &fitparams) override
 init particle in case it has no mother
 
virtual ~RecoResonance ()
 destructor
 
virtual int dim () const override
 dimension of the vector
 
virtual ErrCode projectConstraint (Constraint::Type, const FitParams &, Projection &) const override
 project the constraint
 
virtual int type () const override
 get type
 
virtual int posIndex () const override
 get position index in statevector x,y,z,tau,px,py,pz
 
virtual int momIndex () const override
 get momentum index in statevector
 
virtual int tauIndex () const override
 get tau (decay time) index in statevector
 
virtual std::string parname (int index) const override
 parameter name
 
virtual void addToConstraintList (constraintlist &list, int depth) const override
 add to the list of constraints
 
void updateParams ()
 update changed params
 
ErrCode projectComposite (const FitParams &fitparams, Projection &p) const
 project this particle constraint

 
int dimMeas () const
 dimension of the measurement vector
 
int dimM () const
 get dimension of measurement
 
virtual bool hasEnergy () const override
 return of this constraint/particle has an energy component
 
virtual bool hasPosition () const override
 return true FIXME
 
virtual ErrCode initCovariance (FitParams &) const
 init covariance matrix
 
virtual void updateIndex (int &offset)
 this sets the index for momentum, position, etc.
 
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
 
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

Eigen::Matrix< double, 7, 1 > m_params
 column vector to store the measurement
 
Eigen::Matrix< double, -1, -1, 0, 7, 7 > m_covariance
 only lower triangle filled!
 
bool m_hasEnergy
 flag
 
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

bool m_massconstraint
 has mass constraint
 
int m_index
 index
 
std::string m_name
 name

 

Detailed Description

A class for resonances.

Definition at line 17 of file RecoResonance.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

◆ RecoResonance()

RecoResonance ( Belle2::Particle bc,
const ParticleBase mother,
const ConstraintConfiguration config 
)

constructor

Definition at line 16 of file RecoResonance.cc.

19 :
20 Composite(particle, mother, config),
21 m_massconstraint(false)
22 {
23 m_massconstraint = std::find(config.m_massConstraintListPDG.begin(), config.m_massConstraintListPDG.end(),
24 std::abs(m_particle->getPDGCode())) != config.m_massConstraintListPDG.end();
25 }
int getPDGCode(void) const
Returns PDG code.
Definition: Particle.h:454
Composite(Belle2::Particle *bc, const ParticleBase *mother, const ConstraintConfiguration &config, bool massconstraint=false)
constructor
Definition: Composite.cc:19
Belle2::Particle * particle() const
get basf2 particle
Definition: ParticleBase.h:92
Belle2::Particle * m_particle
pointer to framework type
Definition: ParticleBase.h:192
const ParticleBase * mother() const
getMother() / hasMother()
Definition: ParticleBase.h:98
bool m_massconstraint
has mass constraint
Definition: RecoResonance.h:59

◆ ~RecoResonance()

virtual ~RecoResonance ( )
inlinevirtual

destructor

Definition at line 31 of file RecoResonance.h.

31{};

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

add to the list of constraints

Reimplemented from Composite.

Definition at line 71 of file RecoResonance.cc.

73 {
74 list.push_back(Constraint(this, Constraint::resonance, depth, dimM()));
75
76 if (m_massconstraint) {
77 list.push_back(Constraint(this, Constraint::mass, depth, 1, 3));
78 }
79 }
int dimM() const
get dimension of measurement
Definition: Composite.h:46

◆ 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 }
double getCharge(void) const
Returns particle charge.
Definition: Particle.cc:622

◆ 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

◆ 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
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...
ParticleBase(Belle2::Particle *particle, const ParticleBase *mother, const ConstraintConfiguration *config=nullptr)
default constructor
Definition: ParticleBase.cc:30

◆ dim()

virtual int dim ( ) const
inlineoverridevirtual

dimension of the vector

Reimplemented from Composite.

Definition at line 34 of file RecoResonance.h.

34{ return hasEnergy() ? 4 : 3;} // (px,py,pz,(E))
virtual bool hasEnergy() const override
return of this constraint/particle has an energy component
Definition: Composite.h:64

◆ dimM()

int dimM ( ) const
inlineinherited

get dimension of measurement

Definition at line 46 of file Composite.h.

46{ return m_hasEnergy ? 7 : 6 ; }
bool m_hasEnergy
flag
Definition: Composite.h:88

◆ dimMeas()

int dimMeas ( ) const
inlineinherited

dimension of the measurement vector

Definition at line 40 of file Composite.h.

40{ return m_hasEnergy ? 7 : 6 ; }

◆ 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
inlineoverridevirtualinherited

return of this constraint/particle has an energy component

Reimplemented from ParticleBase.

Definition at line 64 of file Composite.h.

64{ return m_hasEnergy ; }

◆ hasPosition()

virtual bool hasPosition ( ) const
inlineoverridevirtualinherited

return true FIXME

Reimplemented from ParticleBase.

Definition at line 67 of file Composite.h.

67{ return true ; }

◆ index()

int index ( ) const
inlineinherited

get index

Definition at line 95 of file ParticleBase.h.

95{ return m_index ; }

◆ initCovariance()

ErrCode initCovariance ( FitParams fitparams) const
virtualinherited

init covariance matrix

Reimplemented in InternalParticle, Origin, RecoKlong, RecoPhoton, and RecoTrack.

Definition at line 167 of file ParticleBase.cc.

168 {
169 // this is very sensitive and can heavily affect the efficiency of the fit
170 ErrCode status;
171
172 const int posindex = posIndex();
173 if (posindex >= 0) {
174 for (int i = 0; i < 3; ++i) {
175 fitparams.getCovariance()(posindex + i, posindex + i) = 1;
176 }
177 }
178
179 const int momindex = momIndex();
180 if (momindex >= 0) {
181 const int maxrow = hasEnergy() ? 4 : 3;
182 for (int i = 0; i < maxrow; ++i) {
183 fitparams.getCovariance()(momindex + i, momindex + i) = 10.;
184 }
185 }
186
187 const int tauindex = tauIndex();
188 if (tauindex >= 0) {
189 fitparams.getCovariance()(tauindex, tauindex) = 1.;
190 }
191 return status;
192 }
virtual int tauIndex() const
get tau index
Definition: ParticleBase.h:125

◆ initMotherlessParticle()

ErrCode initMotherlessParticle ( FitParams fitparams)
overridevirtual

init particle in case it has no mother

Reimplemented from Composite.

Definition at line 32 of file RecoResonance.cc.

33 {
34 const int posindex = posIndex();
35 const int momindex = momIndex();
36
37 //quick map for parameters
38 int quickindexmap[7];
39 for (int i = 0; i < 3; ++i) {
40 quickindexmap[i] = posindex + i;
41 }
42 for (int i = 0; i < 4; ++i) {
43 quickindexmap[i + 3] = momindex + i;
44 }
45
46 // copy the 'measurement' -> this overwrites mother position !
47 for (int row = 0; row < dimM(); ++row) {
48 fitparams.getStateVector()(quickindexmap[row]) = m_params[row];
49 }
50 return ErrCode(ErrCode::Status::success);
51 }
Eigen::Matrix< double, 7, 1 > m_params
column vector to store the measurement
Definition: Composite.h:82
virtual int momIndex() const override
get momentum index in statevector
Definition: RecoResonance.h:46
virtual int posIndex() const override
get position index in statevector x,y,z,tau,px,py,pz
Definition: RecoResonance.h:43

◆ initParticleWithMother()

ErrCode initParticleWithMother ( FitParams fitparams)
overridevirtual

init particle in case it has a mother

Reimplemented from Composite.

Definition at line 27 of file RecoResonance.cc.

28 {
29 return ErrCode(ErrCode::Status::success);
30 }

◆ 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 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

get momentum index in statevector

Reimplemented from Composite.

Definition at line 46 of file RecoResonance.h.

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

◆ 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

◆ 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
overridevirtual

parameter name

Reimplemented from ParticleBase.

Definition at line 66 of file RecoResonance.cc.

67 {
68 return ParticleBase::parname(index + 4);
69 }
virtual std::string parname(int index) const
get name of parameter i

◆ 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

get position index in statevector x,y,z,tau,px,py,pz

Reimplemented from Composite.

Definition at line 43 of file RecoResonance.h.

43{ return mother()->posIndex(); }

◆ projectComposite()

ErrCode projectComposite ( const FitParams fitparams,
Projection p 
) const
inherited

project this particle constraint

Definition at line 75 of file Composite.cc.

76 {
77 const int posindex = posIndex() ;
78 const int momindex = momIndex() ;
79
80 p.getResiduals().segment(0, 3) = m_params.segment(0, 3) - fitparams.getStateVector().segment(posindex, 3);
81
82 p.getResiduals().segment(3, 4) = m_params.segment(3, 4) - fitparams.getStateVector().segment(momindex, 4);
83
84 for (int row = 0; row < 3; ++row) {
85 p.getH()(row, posindex + row) = -1;
86 }
87
88 for (int row = 0; row < 4; ++row) {
89 p.getH()(3 + row, momindex + row) = -1;
90 }
91
92 p.getV().triangularView<Eigen::Lower>() = m_covariance.triangularView<Eigen::Lower>();
93
94 return ErrCode(ErrCode::Status::success) ;
95 }
virtual int momIndex() const override
get momentum index in statevector
Definition: Composite.h:61
Eigen::Matrix< double, -1, -1, 0, 7, 7 > m_covariance
only lower triangle filled!
Definition: Composite.h:85
virtual int posIndex() const override
get position index in statevectof x,y,z,tau,px,py,pz
Definition: Composite.h:55

◆ projectConstraint()

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

project the constraint

Reimplemented from Composite.

Definition at line 53 of file RecoResonance.cc.

54 {
55 ErrCode status;
56 switch (type) {
57 case Constraint::resonance:
58 status |= projectComposite(fitparams, p);
59 break;
60 default:
61 status |= ParticleBase::projectConstraint(type, fitparams, p);
62 }
63 return status;
64 }
ErrCode projectComposite(const FitParams &fitparams, Projection &p) const
project this particle constraint
Definition: Composite.cc:75
virtual ErrCode projectConstraint(Constraint::Type, const FitParams &, Projection &) const
project constraint.
virtual int type() const override
get type
Definition: RecoResonance.h:40

◆ 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 }

◆ 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

get tau (decay time) index in statevector

Reimplemented from Composite.

Definition at line 49 of file RecoResonance.h.

49{ return -1; }

◆ type()

virtual int type ( ) const
inlineoverridevirtual

get type

Reimplemented from Composite.

Definition at line 40 of file RecoResonance.h.

40{ return kRecoResonance; }

◆ 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 }

◆ updateParams()

void updateParams ( )
inherited

update changed params

Definition at line 43 of file Composite.cc.

44 {
45 const ROOT::Math::XYZVector pos = particle()->getVertex();
46 const ROOT::Math::XYZVector mom = particle()->getMomentum();
47 const double energy = particle()->getEnergy();
48
49 m_params = Eigen::Matrix<double, 7, 1>::Zero(7, 1);
50 m_params(0) = pos.X();
51 m_params(1) = pos.Y();
52 m_params(2) = pos.Z();
53 m_params(3) = mom.X();
54 m_params(4) = mom.Y();
55 m_params(5) = mom.Z();
56
57 m_params(6) = energy;
58
59 m_covariance = Eigen::Matrix < double, -1, -1, 0, 7, 7 >::Zero(7, 7);
60 const TMatrixFSym cov7in = particle()->getMomentumVertexErrorMatrix(); //this is (p,E,x)
61
62 for (int row = 0; row < 4; ++row) { //first the p,E block
63 for (int col = 0; col <= row; ++col) {
64 m_covariance(3 + row, 3 + col) = cov7in[row][col];
65 }
66 }
67
68 for (int row = 0; row < 3; ++row) { //then the x block
69 for (int col = 0; col <= row; ++col) {
70 m_covariance(row, col) = cov7in[4 + row][4 + col];
71 }
72 }
73 }
double getEnergy() const
Returns total energy.
Definition: Particle.h:535
ROOT::Math::XYZVector getVertex() const
Returns vertex position (POCA for charged, IP for neutral FS particles)
Definition: Particle.h:631
ROOT::Math::XYZVector getMomentum() const
Returns momentum vector.
Definition: Particle.h:560
TMatrixFSym getMomentumVertexErrorMatrix() const
Returns 7x7 error matrix.
Definition: Particle.cc:420

Member Data Documentation

◆ m_config

const ConstraintConfiguration* m_config
protectedinherited

has all the constraint config

Definition at line 204 of file ParticleBase.h.

◆ m_covariance

Eigen::Matrix< double, -1, -1, 0, 7, 7 > m_covariance
protectedinherited

only lower triangle filled!

Definition at line 85 of file Composite.h.

◆ m_daughters

std::vector<ParticleBase*> m_daughters
protectedinherited

daughter container

Definition at line 198 of file ParticleBase.h.

◆ m_hasEnergy

bool m_hasEnergy
protectedinherited

flag

Definition at line 88 of file Composite.h.

◆ m_index

int m_index
privateinherited

index

Definition at line 208 of file ParticleBase.h.

◆ m_isStronglyDecayingResonance

bool m_isStronglyDecayingResonance
protectedinherited

decay length less than 1 micron

Definition at line 201 of file ParticleBase.h.

◆ m_massconstraint

bool m_massconstraint
private

has mass constraint

Definition at line 59 of file RecoResonance.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_params

Eigen::Matrix<double, 7, 1> m_params
protectedinherited

column vector to store the measurement

Definition at line 82 of file Composite.h.

◆ m_particle

Belle2::Particle* m_particle
protectedinherited

pointer to framework type

Definition at line 192 of file ParticleBase.h.


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