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MassFitKFit Class Reference

MassFitKFit is a derived class from KFitBase to perform mass-constraint kinematical fit. More...

#include <MassFitKFit.h>

Inheritance diagram for MassFitKFit:
KFitBase

Public Member Functions

 MassFitKFit (void)
 Construct an object with no argument.
 
 ~MassFitKFit (void)
 Destruct the object.
 
enum KFitError::ECode setVertex (const HepPoint3D &v)
 Set an initial vertex position for the mass-constraint fit.
 
enum KFitError::ECode setVertexError (const CLHEP::HepSymMatrix &e)
 Set an initial vertex error matrix for the mass-constraint fit.
 
enum KFitError::ECode setInvariantMass (const double m)
 Set an invariant mass for the mass-constraint fit.
 
enum KFitError::ECode setFlagAtDecayPoint (const bool flag)
 Set a flag if to constraint at the decay point in the mass-constraint fit.
 
enum KFitError::ECode fixMass (void)
 Tell the object to fix the last added track property at the invariant mass.
 
enum KFitError::ECode unfixMass (void)
 Tell the object to unfix the last added track property at the invariant mass.
 
enum KFitError::ECode setTrackVertexError (const CLHEP::HepMatrix &e)
 Set a vertex error matrix of the child particle in the addTrack'ed order.
 
enum KFitError::ECode setTrackZeroVertexError (void)
 Indicate no vertex uncertainty in the child particle in the addTrack'ed order.
 
enum KFitError::ECode setCorrelation (const CLHEP::HepMatrix &m) override
 Set a correlation matrix.
 
enum KFitError::ECode setZeroCorrelation (void) override
 Indicate no correlation between tracks.
 
const HepPoint3D getVertex (const int flag=KFitConst::kAfterFit) const
 Get a vertex position.
 
const CLHEP::HepSymMatrix getVertexError (const int flag=KFitConst::kAfterFit) const
 Get a vertex error matrix.
 
double getInvariantMass (void) const
 Get an invariant mass.
 
bool getFlagAtDecayPoint (void) const
 Get a flag if to constraint at the decay point in the mass-constraint fit.
 
bool getFlagFitWithVertex (void) const
 Get a flag if the fit is allowed with moving the vertex position.
 
double getCHIsq (void) const override
 Get a chi-square of the fit.
 
const CLHEP::HepMatrix getTrackVertexError (const int id, const int flag=KFitConst::kAfterFit) const
 Get a vertex error matrix of the track.
 
double getTrackCHIsq (const int id) const override
 Get a chi-square of the track.
 
const CLHEP::HepMatrix getCorrelation (const int id1, const int id2, const int flag=KFitConst::kAfterFit) const override
 Get a correlation matrix between two tracks.
 
enum KFitError::ECode doFit (void)
 Perform a mass-constraint fit.
 
enum KFitError::ECode updateMother (Particle *mother)
 Update mother particle.
 
enum KFitError::ECode addTrack (const KFitTrack &kp)
 Add a track to the fitter object.
 
enum KFitError::ECode addTrack (const CLHEP::HepLorentzVector &p, const HepPoint3D &x, const CLHEP::HepSymMatrix &e, const double q)
 Add a track to the fitter object with specifying its momentum, position, error matrix, and charge.
 
enum KFitError::ECode addParticle (const Particle *particle)
 Add a particle to the fitter.
 
enum KFitError::ECode setMagneticField (const double mf)
 Change a magnetic field from the default value KFitConst::kDefaultMagneticField.
 
enum KFitError::ECode getErrorCode (void) const
 Get a code of the last error.
 
int getTrackCount (void) const
 Get the number of added tracks.
 
virtual int getNDF (void) const
 Get an NDF of the fit.
 
double getMagneticField (void) const
 Get a magnetic field.
 
const CLHEP::HepLorentzVector getTrackMomentum (const int id) const
 Get a Lorentz vector of the track.
 
const HepPoint3D getTrackPosition (const int id) const
 Get a position of the track.
 
const CLHEP::HepSymMatrix getTrackError (const int id) const
 Get an error matrix of the track.
 
const KFitTrack getTrack (const int id) const
 Get a specified track object.
 
bool isFitted (void) const
 Return false if fit is not performed yet or performed fit is failed; otherwise true.
 

Protected Member Functions

const CLHEP::HepSymMatrix makeError1 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
const CLHEP::HepMatrix makeError1 (const CLHEP::HepLorentzVector &p1, const CLHEP::HepLorentzVector &p2, const CLHEP::HepMatrix &e) const
 Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.
 
const CLHEP::HepMatrix makeError2 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
const CLHEP::HepSymMatrix makeError3 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e, const bool is_fix_mass) const
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
const CLHEP::HepMatrix makeError3 (const CLHEP::HepLorentzVector &p1, const CLHEP::HepLorentzVector &p2, const CLHEP::HepMatrix &e, const bool is_fix_mass1, const bool is_fix_mass2) const
 Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.
 
const CLHEP::HepMatrix makeError4 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
enum KFitError::ECode doFit1 (void)
 Perform a fit (used in MassFitKFit::doFit()).
 
enum KFitError::ECode doFit2 (void)
 Perform a fit (used in VertexFitKFit::doFit() and MassVertexFitKFit::doFit()).
 
bool isTrackIDInRange (const int id) const
 Check if the id is in the range.
 
bool isNonZeroEnergy (const CLHEP::HepLorentzVector &p) const
 Check if the energy is non-zero.
 

Protected Attributes

enum KFitError::ECode m_ErrorCode
 Error code.
 
bool m_FlagFitted
 Flag to indicate if the fit is performed and succeeded.
 
std::vector< KFitTrack > m_Tracks
 Container of input tracks.
 
std::vector< CLHEP::HepMatrix > m_BeforeCorrelation
 Container of input correlation matrices.
 
CLHEP::HepSymMatrix m_V_al_0
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_al_0
 See J.Tanaka Ph.D (2001) p136 for definition.
 
CLHEP::HepMatrix m_al_1
 See J.Tanaka Ph.D (2001) p136 for definition.
 
CLHEP::HepMatrix m_al_a
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_property
 Container of charges and masses.
 
CLHEP::HepMatrix m_D
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_d
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_V_D
 See J.Tanaka Ph.D (2001) p138 for definition.
 
CLHEP::HepMatrix m_V_al_1
 See J.Tanaka Ph.D (2001) p138 for definition.
 
CLHEP::HepMatrix m_lam
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_E
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_V_E
 See J.Tanaka Ph.D (2001) p138 for definition.
 
CLHEP::HepMatrix m_lam0
 See J.Tanaka Ph.D (2001) p138 for definition.
 
CLHEP::HepMatrix m_v
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_v_a
 See J.Tanaka Ph.D (2001) p137 for definition.
 
CLHEP::HepMatrix m_V_Dt
 See J.Tanaka Ph.D (2001) p138 for definition.
 
CLHEP::HepMatrix m_Cov_v_al_1
 See J.Tanaka Ph.D (2001) p137 for definition.
 
int m_NDF
 NDF of the fit.
 
double m_CHIsq
 chi-square of the fit.
 
int m_TrackCount
 Number of tracks.
 
int m_NecessaryTrackCount
 Number needed tracks to perform fit.
 
bool m_FlagCorrelation
 Flag whether a correlation among tracks exists.
 
bool m_FlagOverIteration
 Flag whether the iteration count exceeds the limit.
 
double m_MagneticField
 Magnetic field.
 

Private Member Functions

enum KFitError::ECode prepareInputMatrix (void) override
 Build grand matrices for minimum search from input-track properties.
 
enum KFitError::ECode prepareInputSubMatrix (void) override
 Build sub-matrices for minimum search from input-track properties.
 
enum KFitError::ECode prepareCorrelation (void) override
 Build a grand correlation matrix from input-track properties.
 
enum KFitError::ECode prepareOutputMatrix (void) override
 Build an output error matrix.
 
enum KFitError::ECode makeCoreMatrix (void) override
 Build matrices using the kinematical constraint.
 
enum KFitError::ECode calculateNDF (void) override
 Calculate an NDF of the fit.
 

Private Attributes

HepPoint3D m_BeforeVertex
 Vertex position before the fit.
 
CLHEP::HepSymMatrix m_BeforeVertexError
 Vertex error matrix before the fit.
 
std::vector< CLHEP::HepMatrix > m_BeforeTrackVertexError
 array of vertex error matrices before the fit.
 
HepPoint3D m_AfterVertex
 Vertex position after the fit.
 
CLHEP::HepSymMatrix m_AfterVertexError
 Vertex error matrix after the fit.
 
std::vector< CLHEP::HepMatrix > m_AfterTrackVertexError
 array of vertex error matrices after the fit.
 
bool m_FlagTrackVertexError
 Flag to indicate if the vertex error matrix of the child particle is preset.
 
bool m_FlagFitIncludingVertex
 Flag to indicate if the fit is allowed with moving the vertex position.
 
bool m_FlagAtDecayPoint
 Flag controlled by setFlagAtDecayPoint().
 
double m_InvariantMass
 Invariant mass.
 
std::vector< int > m_IsFixMass
 Array of flags whether the track property is fixed at the mass.
 

Detailed Description

MassFitKFit is a derived class from KFitBase to perform mass-constraint kinematical fit.

Definition at line 33 of file MassFitKFit.h.

Constructor & Destructor Documentation

◆ MassFitKFit()

MassFitKFit ( void  )

Construct an object with no argument.

Definition at line 25 of file MassFitKFit.cc.

26{
27 m_FlagFitted = false;
28 m_FlagTrackVertexError = false;
29 m_FlagFitIncludingVertex = false;
30 m_FlagAtDecayPoint = true;
31 m_NecessaryTrackCount = 2;
32 m_d = HepMatrix(1, 1, 0);
33 m_V_D = HepMatrix(1, 1, 0);
34 m_lam = HepMatrix(1, 1, 0);
35 m_AfterVertexError = HepSymMatrix(3, 0);
36 m_InvariantMass = -1.0;
37}
Belle2::analysis::KFitBase::m_NecessaryTrackCount
int m_NecessaryTrackCount
Number needed tracks to perform fit.
Definition: KFitBase.h:303
Belle2::analysis::KFitBase::m_lam
CLHEP::HepMatrix m_lam
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:276
Belle2::analysis::KFitBase::m_d
CLHEP::HepMatrix m_d
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:268
Belle2::analysis::KFitBase::m_V_D
CLHEP::HepMatrix m_V_D
See J.Tanaka Ph.D (2001) p138 for definition.
Definition: KFitBase.h:271
Belle2::analysis::KFitBase::m_FlagFitted
bool m_FlagFitted
Flag to indicate if the fit is performed and succeeded.
Definition: KFitBase.h:245
Belle2::analysis::MassFitKFit::m_FlagTrackVertexError
bool m_FlagTrackVertexError
Flag to indicate if the vertex error matrix of the child particle is preset.
Definition: MassFitKFit.h:156
Belle2::analysis::MassFitKFit::m_FlagAtDecayPoint
bool m_FlagAtDecayPoint
Flag controlled by setFlagAtDecayPoint().
Definition: MassFitKFit.h:160
Belle2::analysis::MassFitKFit::m_FlagFitIncludingVertex
bool m_FlagFitIncludingVertex
Flag to indicate if the fit is allowed with moving the vertex position.
Definition: MassFitKFit.h:158
Belle2::analysis::MassFitKFit::m_InvariantMass
double m_InvariantMass
Invariant mass.
Definition: MassFitKFit.h:163
Belle2::analysis::MassFitKFit::m_AfterVertexError
CLHEP::HepSymMatrix m_AfterVertexError
Vertex error matrix after the fit.
Definition: MassFitKFit.h:151

Member Function Documentation

◆ addParticle()

enum KFitError::ECode addParticle ( const Particle *  particle)
inherited

Add a particle to the fitter.

The function gets track parameters from the Particle dataobject and calls addTrack().

Parameters
[in]particleParticle.
Returns
error code (zero if success)

Definition at line 59 of file KFitBase.cc.

60{
61 return addTrack(
62 ROOTToCLHEP::getHepLorentzVector(particle->get4Vector()),
63 ROOTToCLHEP::getPoint3D(particle->getVertex()),
64 ROOTToCLHEP::getHepSymMatrix(particle->getMomentumVertexErrorMatrix()),
65 particle->getCharge());
66}
Belle2::analysis::KFitBase::addTrack
enum KFitError::ECode addTrack(const KFitTrack &kp)
Add a track to the fitter object.
Definition: KFitBase.cc:38

◆ addTrack() [1/2]

enum KFitError::ECode addTrack ( const CLHEP::HepLorentzVector &  p,
const HepPoint3D &  x,
const CLHEP::HepSymMatrix &  e,
const double  q 
)
inherited

Add a track to the fitter object with specifying its momentum, position, error matrix, and charge.

This function internally calls addTrack(const KFitTrack &kp).

Parameters
pLorentz vector of the track
xposition of the track
e(7x7) error matrix of the track
qcharge of the track
Returns
error code (zero if success)

Definition at line 47 of file KFitBase.cc.

47 {
48 if (e.num_row() != KFitConst::kNumber7)
49 {
50 m_ErrorCode = KFitError::kBadMatrixSize;
51 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
52 return m_ErrorCode;
53 }
54
55 return this->addTrack(KFitTrack(p, x, e, q));
56}
Belle2::analysis::KFitBase::m_ErrorCode
enum KFitError::ECode m_ErrorCode
Error code.
Definition: KFitBase.h:243
Belle2::analysis::KFitError::displayError
static void displayError(const char *file, const int line, const char *func, const enum ECode code)
Display a description of error and its location.
Definition: KFitError.h:72
Belle2::analysis::KFitError::kBadMatrixSize
@ kBadMatrixSize
Wrong correlation matrix size.
Definition: KFitError.h:49
Belle2::analysis::KFitTrack
KFitTrack is a container of the track information (Lorentz vector, position, and error matrix),...
Definition: KFitTrack.h:38
Belle2::analysis::KFitConst::kNumber7
static const int kNumber7
Constant 7 to check matrix size (internal use)
Definition: KFitConst.h:32

◆ addTrack() [2/2]

enum KFitError::ECode addTrack ( const KFitTrack &  kp)
inherited

Add a track to the fitter object.

Parameters
kpobject of the track
Returns
error code (zero if success)

Definition at line 38 of file KFitBase.cc.

38 {
39 m_Tracks.push_back(p);
40 m_TrackCount = m_Tracks.size();
41
42 return m_ErrorCode = KFitError::kNoError;
43}
Belle2::analysis::KFitBase::m_Tracks
std::vector< KFitTrack > m_Tracks
Container of input tracks.
Definition: KFitBase.h:249
Belle2::analysis::KFitBase::m_TrackCount
int m_TrackCount
Number of tracks.
Definition: KFitBase.h:301

◆ calculateNDF()

enum KFitError::ECode calculateNDF ( void  )
overrideprivatevirtual

Calculate an NDF of the fit.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 685 of file MassFitKFit.cc.

685 {
686 m_NDF = 1;
687
688 return m_ErrorCode = KFitError::kNoError;
689}
Belle2::analysis::KFitBase::m_NDF
int m_NDF
NDF of the fit.
Definition: KFitBase.h:295

◆ doFit()

enum KFitError::ECode doFit ( void  )

Perform a mass-constraint fit.

Returns
error code (zero if success)

Definition at line 280 of file MassFitKFit.cc.

280 {
281 return KFitBase::doFit1();
282}
Belle2::analysis::KFitBase::doFit1
enum KFitError::ECode doFit1(void)
Perform a fit (used in MassFitKFit::doFit()).
Definition: KFitBase.cc:502

◆ doFit1()

enum KFitError::ECode doFit1 ( void  )
protectedinherited

Perform a fit (used in MassFitKFit::doFit()).

Returns
error code (zero if success)

Definition at line 502 of file KFitBase.cc.

502 {
503 if (m_ErrorCode != KFitError::kNoError) return m_ErrorCode;
504
505 if (m_TrackCount < m_NecessaryTrackCount)
506 {
507 m_ErrorCode = KFitError::kBadTrackSize;
508 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
509 return m_ErrorCode;
510 }
511
512 if (prepareInputMatrix() != KFitError::kNoError) return m_ErrorCode;
513 if (calculateNDF() != KFitError::kNoError) return m_ErrorCode;
514
515
516 double chisq = 0;
517 double tmp_chisq = KFitConst::kInitialCHIsq;
518 int err_inverse = 0;
519
520 HepMatrix tmp_al_1(m_al_1);
521 HepMatrix tmp_V_al_1(m_V_al_1);
522
523 m_al_a = m_al_0;
524 HepMatrix tmp_al_a(m_al_a);
525
526
527 for (int i = 0; i < KFitConst::kMaxIterationCount; i++)
528 {
529 if (makeCoreMatrix() != KFitError::kNoError) return m_ErrorCode;
530
531 m_V_D = (m_V_al_0.similarity(m_D)).inverse(err_inverse);
532 if (err_inverse != 0) {
533 m_ErrorCode = KFitError::kCannotGetMatrixInverse;
534 return m_ErrorCode;
535 }
536
537 m_lam = m_V_D * (m_D * (m_al_0 - m_al_1) + m_d);
538 chisq = ((m_lam.T()) * (m_D * (m_al_0 - m_al_1) + m_d))(1, 1);
539 m_al_1 = m_al_0 - m_V_al_0 * (m_D.T()) * m_lam;
540 m_V_al_1 = m_V_al_0 - m_V_al_0 * (m_D.T()) * m_V_D * m_D * m_V_al_0;
541
542 if (tmp_chisq <= chisq) {
543 if (i == 0) {
544 m_ErrorCode = KFitError::kBadInitialCHIsq;
545 return m_ErrorCode;
546 } else {
547 chisq = tmp_chisq;
548 m_al_1 = tmp_al_1;
549 m_al_a = tmp_al_a;
550 m_V_al_1 = tmp_V_al_1;
551 break;
552 }
553 } else {
554 tmp_chisq = chisq;
555 tmp_al_a = tmp_al_1;
556 tmp_al_1 = m_al_1;
557 tmp_V_al_1 = m_V_al_1;
558 if (i == KFitConst::kMaxIterationCount - 1) {
559 m_al_a = tmp_al_1;
560 m_FlagOverIteration = true;
561 }
562 }
563 }
564
565 if (m_ErrorCode != KFitError::kNoError) return m_ErrorCode;
566
567 if (prepareOutputMatrix() != KFitError::kNoError) return m_ErrorCode;
568
569 m_CHIsq = chisq;
570
571 m_FlagFitted = true;
572
573 return m_ErrorCode = KFitError::kNoError;
574}
Belle2::analysis::KFitBase::prepareInputMatrix
virtual enum KFitError::ECode prepareInputMatrix(void)=0
Build grand matrices for minimum search from input-track properties.
Belle2::analysis::KFitBase::prepareOutputMatrix
virtual enum KFitError::ECode prepareOutputMatrix(void)=0
Build an output error matrix.
Belle2::analysis::KFitBase::m_al_1
CLHEP::HepMatrix m_al_1
See J.Tanaka Ph.D (2001) p136 for definition.
Definition: KFitBase.h:259
Belle2::analysis::KFitBase::m_FlagOverIteration
bool m_FlagOverIteration
Flag whether the iteration count exceeds the limit.
Definition: KFitBase.h:308
Belle2::analysis::KFitBase::m_V_al_1
CLHEP::HepMatrix m_V_al_1
See J.Tanaka Ph.D (2001) p138 for definition.
Definition: KFitBase.h:274
Belle2::analysis::KFitBase::m_al_a
CLHEP::HepMatrix m_al_a
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:261
Belle2::analysis::KFitBase::m_D
CLHEP::HepMatrix m_D
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:266
Belle2::analysis::KFitBase::m_V_al_0
CLHEP::HepSymMatrix m_V_al_0
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:255
Belle2::analysis::KFitBase::makeCoreMatrix
virtual enum KFitError::ECode makeCoreMatrix(void)=0
Build matrices using the kinematical constraint.
Belle2::analysis::KFitBase::m_CHIsq
double m_CHIsq
chi-square of the fit.
Definition: KFitBase.h:297
Belle2::analysis::KFitBase::calculateNDF
virtual enum KFitError::ECode calculateNDF(void)=0
Calculate an NDF of the fit.
Belle2::analysis::KFitBase::m_al_0
CLHEP::HepMatrix m_al_0
See J.Tanaka Ph.D (2001) p136 for definition.
Definition: KFitBase.h:257
Belle2::analysis::KFitError::kCannotGetMatrixInverse
@ kCannotGetMatrixInverse
Cannot calculate matrix inverse (bad track property or internal error)
Definition: KFitError.h:58
Belle2::analysis::KFitError::kBadInitialCHIsq
@ kBadInitialCHIsq
Bad initial chi-square (internal error)
Definition: KFitError.h:53
Belle2::analysis::KFitError::kBadTrackSize
@ kBadTrackSize
Track count too small to perform fit.
Definition: KFitError.h:47
Belle2::analysis::KFitConst::kInitialCHIsq
static constexpr double kInitialCHIsq
Initial chi-square value (internal use)
Definition: KFitConst.h:48
Belle2::analysis::KFitConst::kMaxIterationCount
static const int kMaxIterationCount
Maximum iteration step (internal use)
Definition: KFitConst.h:45

◆ doFit2()

enum KFitError::ECode doFit2 ( void  )
protectedinherited

Perform a fit (used in VertexFitKFit::doFit() and MassVertexFitKFit::doFit()).

Returns
error code (zero if success)

Definition at line 578 of file KFitBase.cc.

578 {
579 if (m_ErrorCode != KFitError::kNoError) return m_ErrorCode;
580
581 if (m_TrackCount < m_NecessaryTrackCount)
582 {
583 m_ErrorCode = KFitError::kBadTrackSize;
584 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
585 return m_ErrorCode;
586 }
587
588 if (prepareInputMatrix() != KFitError::kNoError) return m_ErrorCode;
589 if (calculateNDF() != KFitError::kNoError) return m_ErrorCode;
590
591
592 double chisq = 0;
593 double tmp2_chisq = KFitConst::kInitialCHIsq;
594 int err_inverse = 0;
595
596 m_al_a = m_al_0;
597 HepMatrix tmp_al_a(m_al_a);
598
599 HepMatrix tmp_D(m_D), tmp_E(m_E);
600 HepMatrix tmp_V_D(m_V_D), tmp_V_E(m_V_E);
601 HepMatrix tmp_lam0(m_lam0), tmp_v_a(m_v_a);
602
603 HepMatrix tmp2_D(m_D), tmp2_E(m_E);
604 HepMatrix tmp2_V_D(m_V_D), tmp2_V_E(m_V_E);
605 HepMatrix tmp2_lam0(m_lam0), tmp2_v_a(m_v_a), tmp2_v(m_v_a);
606
607
608 for (int j = 0; j < KFitConst::kMaxIterationCount; j++) // j'th loop start
609 {
610
611 double tmp_chisq = KFitConst::kInitialCHIsq;
612
613 for (int i = 0; i < KFitConst::kMaxIterationCount; i++) { // i'th loop start
614
615 if (prepareInputSubMatrix() != KFitError::kNoError) return m_ErrorCode;
616 if (makeCoreMatrix() != KFitError::kNoError) return m_ErrorCode;
617
618 m_V_D = (m_V_al_0.similarity(m_D)).inverse(err_inverse);
619 if (err_inverse) {
620 m_ErrorCode = KFitError::kCannotGetMatrixInverse;
621 return m_ErrorCode;
622 }
623
624 m_V_E = ((m_E.T()) * m_V_D * m_E).inverse(err_inverse);
625 if (err_inverse) {
626 m_ErrorCode = KFitError::kCannotGetMatrixInverse;
627 return m_ErrorCode;
628 }
629 m_lam0 = m_V_D * (m_D * (m_al_0 - m_al_1) + m_d);
630 chisq = ((m_lam0.T()) * (m_D * (m_al_0 - m_al_1) + m_E * (m_v - m_v_a) + m_d))(1, 1);
631 m_v_a = m_v_a - m_V_E * (m_E.T()) * m_lam0;
632
633 if (tmp_chisq <= chisq) {
634 if (i == 0) {
635 m_ErrorCode = KFitError::kBadInitialCHIsq;
636 return m_ErrorCode;
637 } else {
638 chisq = tmp_chisq;
639 m_v_a = tmp_v_a;
640 m_V_E = tmp_V_E;
641 m_V_D = tmp_V_D;
642 m_lam0 = tmp_lam0;
643 m_E = tmp_E;
644 m_D = tmp_D;
645 break;
646 }
647 } else {
648 tmp_chisq = chisq;
649 tmp_v_a = m_v_a;
650 tmp_V_E = m_V_E;
651 tmp_V_D = m_V_D;
652 tmp_lam0 = m_lam0;
653 tmp_E = m_E;
654 tmp_D = m_D;
655 if (i == KFitConst::kMaxIterationCount - 1) {
656 m_FlagOverIteration = true;
657 }
658 }
659 } // i'th loop over
660
661
662 m_al_a = m_al_1;
663 m_lam = m_lam0 - m_V_D * m_E * m_V_E * (m_E.T()) * m_lam0;
664 m_al_1 = m_al_0 - m_V_al_0 * (m_D.T()) * m_lam;
665
666 if (j == 0) {
667
668 tmp2_chisq = chisq;
669 tmp2_v_a = m_v_a;
670 tmp2_v = m_v;
671 tmp2_V_E = m_V_E;
672 tmp2_V_D = m_V_D;
673 tmp2_lam0 = m_lam0;
674 tmp2_E = m_E;
675 tmp2_D = m_D;
676 tmp_al_a = m_al_a;
677
678 } else {
679
680 if (tmp2_chisq <= chisq) {
681 chisq = tmp2_chisq;
682 m_v_a = tmp2_v_a;
683 m_v = tmp2_v;
684 m_V_E = tmp2_V_E;
685 m_V_D = tmp2_V_D;
686 m_lam0 = tmp2_lam0;
687 m_E = tmp2_E;
688 m_D = tmp2_D;
689 m_al_a = tmp_al_a;
690 break;
691 } else {
692 tmp2_chisq = chisq;
693 tmp2_v_a = m_v_a;
694 tmp2_v = m_v;
695 tmp2_V_E = m_V_E;
696 tmp2_V_D = m_V_D;
697 tmp2_lam0 = m_lam0;
698 tmp2_E = m_E;
699 tmp2_D = m_D;
700 tmp_al_a = m_al_a;
701 if (j == KFitConst::kMaxIterationCount - 1) {
702 m_FlagOverIteration = true;
703 }
704 }
705 }
706 } // j'th loop over
707
708
709 if (m_ErrorCode != KFitError::kNoError) return m_ErrorCode;
710
711 m_lam = m_lam0 - m_V_D * m_E * m_V_E * (m_E.T()) * m_lam0;
712 m_al_1 = m_al_0 - m_V_al_0 * (m_D.T()) * m_lam;
713 m_V_Dt = m_V_D - m_V_D * m_E * m_V_E * (m_E.T()) * m_V_D;
714 m_V_al_1 = m_V_al_0 - m_V_al_0 * (m_D.T()) * m_V_Dt * m_D * m_V_al_0;
715 m_Cov_v_al_1 = -m_V_E * (m_E.T()) * m_V_D * m_D * m_V_al_0;
716
717 if (prepareOutputMatrix() != KFitError::kNoError) return m_ErrorCode;
718
719 m_CHIsq = chisq;
720
721 m_FlagFitted = true;
722
723 return m_ErrorCode = KFitError::kNoError;
724}
Belle2::analysis::KFitBase::m_V_Dt
CLHEP::HepMatrix m_V_Dt
See J.Tanaka Ph.D (2001) p138 for definition.
Definition: KFitBase.h:289
Belle2::analysis::KFitBase::m_E
CLHEP::HepMatrix m_E
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:279
Belle2::analysis::KFitBase::prepareInputSubMatrix
virtual enum KFitError::ECode prepareInputSubMatrix(void)=0
Build sub-matrices for minimum search from input-track properties.
Belle2::analysis::KFitBase::m_lam0
CLHEP::HepMatrix m_lam0
See J.Tanaka Ph.D (2001) p138 for definition.
Definition: KFitBase.h:283
Belle2::analysis::KFitBase::m_v_a
CLHEP::HepMatrix m_v_a
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:287
Belle2::analysis::KFitBase::m_V_E
CLHEP::HepMatrix m_V_E
See J.Tanaka Ph.D (2001) p138 for definition.
Definition: KFitBase.h:281
Belle2::analysis::KFitBase::m_Cov_v_al_1
CLHEP::HepMatrix m_Cov_v_al_1
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:291
Belle2::analysis::KFitBase::m_v
CLHEP::HepMatrix m_v
See J.Tanaka Ph.D (2001) p137 for definition.
Definition: KFitBase.h:285

◆ fixMass()

enum KFitError::ECode fixMass ( void  )

Tell the object to fix the last added track property at the invariant mass.

Not intended for end user's use.

Returns
error code (zero if success)

Definition at line 84 of file MassFitKFit.cc.

84 {
85 m_IsFixMass.push_back(true);
86
87 return m_ErrorCode = KFitError::kNoError;
88}
Belle2::analysis::MassFitKFit::m_IsFixMass
std::vector< int > m_IsFixMass
Array of flags whether the track property is fixed at the mass.
Definition: MassFitKFit.h:165

◆ getCHIsq()

double getCHIsq ( void  ) const
overridevirtual

Get a chi-square of the fit.

Returns
chi-square of the fit

Reimplemented from KFitBase.

Definition at line 193 of file MassFitKFit.cc.

194{
195 return m_CHIsq;
196}

◆ getCorrelation()

const HepMatrix getCorrelation ( const int  id1,
const int  id2,
const int  flag = KFitConst::kAfterFit 
) const
overridevirtual

Get a correlation matrix between two tracks.

Parameters
id1first track id
id2second track id
flagKFitConst::kBeforeFit or KFitConst::kAfterFit
Returns
(7x7) correlation matrix

Reimplemented from KFitBase.

Definition at line 253 of file MassFitKFit.cc.

254{
255 if (flag == KFitConst::kAfterFit && !isFitted()) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
256 if (!isTrackIDInRange(id1)) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
257 if (!isTrackIDInRange(id2)) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
258
259 switch (flag) {
260 case KFitConst::kBeforeFit:
261 return KFitBase::getCorrelation(id1, id2, flag);
262
263 case KFitConst::kAfterFit:
264 return makeError3(
265 this->getTrackMomentum(id1),
266 this->getTrackMomentum(id2),
267 m_V_al_1.sub(KFitConst::kNumber7 * id1 + 1, KFitConst::kNumber7 * (id1 + 1), KFitConst::kNumber7 * id2 + 1,
268 KFitConst::kNumber7 * (id2 + 1)),
269 m_IsFixMass[id1],
270 m_IsFixMass[id2]);
271
272 default:
273 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
274 return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
275 }
276}
Belle2::analysis::KFitBase::makeError3
const CLHEP::HepSymMatrix makeError3(const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e, const bool is_fix_mass) const
Rebuild an error matrix from a Lorentz vector and an error matrix.
Definition: KFitBase.cc:320
Belle2::analysis::KFitBase::getTrackMomentum
const CLHEP::HepLorentzVector getTrackMomentum(const int id) const
Get a Lorentz vector of the track.
Definition: KFitBase.cc:154
Belle2::analysis::KFitBase::isFitted
bool isFitted(void) const
Return false if fit is not performed yet or performed fit is failed; otherwise true.
Definition: KFitBase.cc:728
Belle2::analysis::KFitBase::isTrackIDInRange
bool isTrackIDInRange(const int id) const
Check if the id is in the range.
Definition: KFitBase.cc:739
Belle2::analysis::KFitBase::getCorrelation
virtual const CLHEP::HepMatrix getCorrelation(const int id1, const int id2, const int flag=KFitConst::kAfterFit) const
Get a correlation matrix between two tracks.
Definition: KFitBase.cc:183
Belle2::analysis::KFitError::kOutOfRange
@ kOutOfRange
Specified track-id out of range.
Definition: KFitError.h:42
Belle2::analysis::KFitConst::kAfterFit
static const int kAfterFit
Input parameter to specify after-fit when setting/getting a track attribute.
Definition: KFitConst.h:37
Belle2::analysis::KFitConst::kBeforeFit
static const int kBeforeFit
Input parameter to specify before-fit when setting/getting a track attribute.
Definition: KFitConst.h:35

◆ getErrorCode()

enum KFitError::ECode getErrorCode ( void  ) const
inherited

Get a code of the last error.

Returns
the last error code

Definition at line 101 of file KFitBase.cc.

101 {
102 return m_ErrorCode;
103}

◆ getFlagAtDecayPoint()

bool getFlagAtDecayPoint ( void  ) const

Get a flag if to constraint at the decay point in the mass-constraint fit.

Returns
flag value

Definition at line 179 of file MassFitKFit.cc.

180{
181 return m_FlagAtDecayPoint;
182}

◆ getFlagFitWithVertex()

bool getFlagFitWithVertex ( void  ) const

Get a flag if the fit is allowed with moving the vertex position.

Returns
flag value

Definition at line 186 of file MassFitKFit.cc.

187{
188 return m_FlagFitIncludingVertex;
189}

◆ getInvariantMass()

double getInvariantMass ( void  ) const

Get an invariant mass.

Returns
invariant mass

Definition at line 172 of file MassFitKFit.cc.

173{
174 return m_InvariantMass;
175}

◆ getMagneticField()

double getMagneticField ( void  ) const
inherited

Get a magnetic field.

Returns
magnetic field

Definition at line 128 of file KFitBase.cc.

129{
130 return m_MagneticField;
131}
Belle2::analysis::KFitBase::m_MagneticField
double m_MagneticField
Magnetic field.
Definition: KFitBase.h:311

◆ getNDF()

int getNDF ( void  ) const
virtualinherited

Get an NDF of the fit.

Returns
NDF of the fit

Definition at line 114 of file KFitBase.cc.

115{
116 return m_NDF;
117}

◆ getTrack()

const KFitTrack getTrack ( const int  id) const
inherited

Get a specified track object.

Parameters
idtrack id
Returns
specified track object

Definition at line 175 of file KFitBase.cc.

176{
177 if (!isTrackIDInRange(id)) return KFitTrack();
178 return m_Tracks[id];
179}

◆ getTrackCHIsq()

double getTrackCHIsq ( const int  id) const
overridevirtual

Get a chi-square of the track.

Parameters
idtrack id
Returns
chi-square of the track

Reimplemented from KFitBase.

Definition at line 217 of file MassFitKFit.cc.

218{
219 if (!isFitted()) return -1;
220 if (!isTrackIDInRange(id)) return -1;
221
222 if (m_IsFixMass[id]) {
223
224 HepMatrix da(m_Tracks[id].getFitParameter(KFitConst::kBeforeFit) - m_Tracks[id].getFitParameter(KFitConst::kAfterFit));
225 int err_inverse = 0;
226 const double chisq = (da.T() * (m_Tracks[id].getFitError(KFitConst::kBeforeFit).inverse(err_inverse)) * da)[0][0];
227
228 if (err_inverse) {
229 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kCannotGetMatrixInverse);
230 return -1;
231 }
232
233 return chisq;
234
235 } else {
236
237 HepMatrix da(m_Tracks[id].getMomPos(KFitConst::kBeforeFit) - m_Tracks[id].getMomPos(KFitConst::kAfterFit));
238 int err_inverse = 0;
239 const double chisq = (da.T() * (m_Tracks[id].getError(KFitConst::kBeforeFit).inverse(err_inverse)) * da)[0][0];
240
241 if (err_inverse) {
242 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kCannotGetMatrixInverse);
243 return -1;
244 }
245
246 return chisq;
247
248 }
249}

◆ getTrackCount()

int getTrackCount ( void  ) const
inherited

Get the number of added tracks.

Returns
the number of added tracks

Definition at line 107 of file KFitBase.cc.

108{
109 return m_TrackCount;
110}

◆ getTrackError()

const HepSymMatrix getTrackError ( const int  id) const
inherited

Get an error matrix of the track.

Parameters
idtrack id
Returns
error matrix of the track

Definition at line 168 of file KFitBase.cc.

169{
170 if (!isTrackIDInRange(id)) return HepSymMatrix(KFitConst::kNumber7, 0);
171 return m_Tracks[id].getError();
172}

◆ getTrackMomentum()

const HepLorentzVector getTrackMomentum ( const int  id) const
inherited

Get a Lorentz vector of the track.

Parameters
idtrack id
Returns
Lorentz vector of the track

Definition at line 154 of file KFitBase.cc.

155{
156 if (!isTrackIDInRange(id)) return HepLorentzVector();
157 return m_Tracks[id].getMomentum();
158}

◆ getTrackPosition()

const HepPoint3D getTrackPosition ( const int  id) const
inherited

Get a position of the track.

Parameters
idtrack id
Returns
position of the track

Definition at line 161 of file KFitBase.cc.

162{
163 if (!isTrackIDInRange(id)) return HepPoint3D();
164 return m_Tracks[id].getPosition();
165}

◆ getTrackVertexError()

const HepMatrix getTrackVertexError ( const int  id,
const int  flag = KFitConst::kAfterFit 
) const

Get a vertex error matrix of the track.

Parameters
idtrack id
flagKFitConst::kBeforeFit or KFitConst::kAfterFit
Returns
vertex error matrix

Definition at line 200 of file MassFitKFit.cc.

201{
202 if (flag == KFitConst::kAfterFit && !isFitted()) return HepMatrix(3, KFitConst::kNumber7, 0);
203 if (!isTrackIDInRange(id)) return HepMatrix(3, KFitConst::kNumber7, 0);
204
205 if (flag == KFitConst::kBeforeFit)
206 return m_BeforeTrackVertexError[id];
207 else if (flag == KFitConst::kAfterFit && m_FlagFitIncludingVertex)
208 return m_AfterTrackVertexError[id];
209 else {
210 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
211 return HepMatrix(3, KFitConst::kNumber7, 0);
212 }
213}
Belle2::analysis::MassFitKFit::m_BeforeTrackVertexError
std::vector< CLHEP::HepMatrix > m_BeforeTrackVertexError
array of vertex error matrices before the fit.
Definition: MassFitKFit.h:146
Belle2::analysis::MassFitKFit::m_AfterTrackVertexError
std::vector< CLHEP::HepMatrix > m_AfterTrackVertexError
array of vertex error matrices after the fit.
Definition: MassFitKFit.h:153

◆ getVertex()

const HepPoint3D getVertex ( const int  flag = KFitConst::kAfterFit) const

Get a vertex position.

Parameters
flagKFitConst::kBeforeFit or KFitConst::kAfterFit
Returns
vertex position

Definition at line 137 of file MassFitKFit.cc.

138{
139 if (flag == KFitConst::kAfterFit && !isFitted()) return HepPoint3D();
140
141 switch (flag) {
142 case KFitConst::kBeforeFit:
143 return m_BeforeVertex;
144
145 case KFitConst::kAfterFit:
146 return m_AfterVertex;
147
148 default:
149 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
150 return HepPoint3D();
151 }
152}
Belle2::analysis::MassFitKFit::m_AfterVertex
HepPoint3D m_AfterVertex
Vertex position after the fit.
Definition: MassFitKFit.h:149
Belle2::analysis::MassFitKFit::m_BeforeVertex
HepPoint3D m_BeforeVertex
Vertex position before the fit.
Definition: MassFitKFit.h:142

◆ getVertexError()

const HepSymMatrix getVertexError ( const int  flag = KFitConst::kAfterFit) const

Get a vertex error matrix.

Parameters
flagKFitConst::kBeforeFit or KFitConst::kAfterFit
Returns
vertex error matrix

Definition at line 156 of file MassFitKFit.cc.

157{
158 if (flag == KFitConst::kAfterFit && !isFitted()) return HepSymMatrix(3, 0);
159
160 if (flag == KFitConst::kBeforeFit)
161 return m_BeforeVertexError;
162 else if (flag == KFitConst::kAfterFit && m_FlagFitIncludingVertex)
163 return m_AfterVertexError;
164 else {
165 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
166 return HepSymMatrix(3, 0);
167 }
168}
Belle2::analysis::MassFitKFit::m_BeforeVertexError
CLHEP::HepSymMatrix m_BeforeVertexError
Vertex error matrix before the fit.
Definition: MassFitKFit.h:144

◆ isFitted()

bool isFitted ( void  ) const
inherited

Return false if fit is not performed yet or performed fit is failed; otherwise true.

Returns
see description

Definition at line 728 of file KFitBase.cc.

729{
730 if (m_FlagFitted) return true;
731
732 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kNotFittedYet);
733
734 return false;
735}
Belle2::analysis::KFitError::kNotFittedYet
@ kNotFittedYet
Not fitted yet.
Definition: KFitError.h:39

◆ isNonZeroEnergy()

bool isNonZeroEnergy ( const CLHEP::HepLorentzVector &  p) const
protectedinherited

Check if the energy is non-zero.

Parameters
pLorentz vector
Returns
true for non-zero energy, false for otherwise

Definition at line 750 of file KFitBase.cc.

751{
752 if (p.t() != 0) return true;
753
754 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kDivisionByZero);
755
756 return false;
757}
Belle2::analysis::KFitError::kDivisionByZero
@ kDivisionByZero
Division by zero (bad track property or internal error)
Definition: KFitError.h:56

◆ isTrackIDInRange()

bool isTrackIDInRange ( const int  id) const
protectedinherited

Check if the id is in the range.

Parameters
idtrack id
Returns
true if the id is in the range, false otherwise

Definition at line 739 of file KFitBase.cc.

740{
741 if (0 <= id && id < m_TrackCount) return true;
742
743 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
744
745 return false;
746}

◆ makeCoreMatrix()

enum KFitError::ECode makeCoreMatrix ( void  )
overrideprivatevirtual

Build matrices using the kinematical constraint.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 537 of file MassFitKFit.cc.

537 {
538 if (!m_FlagFitIncludingVertex)
539 {
540
541 HepMatrix al_1_prime(m_al_1);
542 HepMatrix Sum_al_1(4, 1, 0);
543 std::vector<double> energy(m_TrackCount);
544 double a;
545
546 for (int i = 0; i < m_TrackCount; i++) {
547 a = m_property[i][2];
548 if (!m_FlagAtDecayPoint) a = 0.;
549 al_1_prime[i * KFitConst::kNumber7 + 0][0] -= a * (m_BeforeVertex.y() - al_1_prime[i * KFitConst::kNumber7 + 5][0]);
550 al_1_prime[i * KFitConst::kNumber7 + 1][0] += a * (m_BeforeVertex.x() - al_1_prime[i * KFitConst::kNumber7 + 4][0]);
551 energy[i] = sqrt(al_1_prime[i * KFitConst::kNumber7 + 0][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] +
552 al_1_prime[i * KFitConst::kNumber7 + 1][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] +
553 al_1_prime[i * KFitConst::kNumber7 + 2][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] +
554 m_property[i][1] * m_property[i][1]);
555 if (m_IsFixMass[i])
556 Sum_al_1[3][0] += energy[i];
557 else
558 Sum_al_1[3][0] += al_1_prime[i * KFitConst::kNumber7 + 3][0];
559 }
560
561 for (int i = 0; i < m_TrackCount; i++) {
562 for (int j = 0; j < 3; j++) Sum_al_1[j][0] += al_1_prime[i * KFitConst::kNumber7 + j][0];
563 }
564
565 m_d[0][0] =
566 + Sum_al_1[3][0] * Sum_al_1[3][0] - Sum_al_1[0][0] * Sum_al_1[0][0]
567 - Sum_al_1[1][0] * Sum_al_1[1][0] - Sum_al_1[2][0] * Sum_al_1[2][0]
568 - m_InvariantMass * m_InvariantMass;
569
570 for (int i = 0; i < m_TrackCount; i++) {
571 if (energy[i] == 0) {
572 m_ErrorCode = KFitError::kDivisionByZero;
573 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
574 break;
575 }
576
577 a = m_property[i][2];
578 if (!m_FlagAtDecayPoint) a = 0.;
579
580 if (m_IsFixMass[i]) {
581 double invE = 1. / energy[i];
582 m_D[0][i * KFitConst::kNumber7 + 0] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE - Sum_al_1[0][0]);
583 m_D[0][i * KFitConst::kNumber7 + 1] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE - Sum_al_1[1][0]);
584 m_D[0][i * KFitConst::kNumber7 + 2] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] * invE - Sum_al_1[2][0]);
585 m_D[0][i * KFitConst::kNumber7 + 3] = 0.;
586 m_D[0][i * KFitConst::kNumber7 + 4] = -2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE - Sum_al_1[1][0]) * a;
587 m_D[0][i * KFitConst::kNumber7 + 5] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE - Sum_al_1[0][0]) * a;
588 m_D[0][i * KFitConst::kNumber7 + 6] = 0.;
589 } else {
590 m_D[0][i * KFitConst::kNumber7 + 0] = -2.*Sum_al_1[0][0];
591 m_D[0][i * KFitConst::kNumber7 + 1] = -2.*Sum_al_1[1][0];
592 m_D[0][i * KFitConst::kNumber7 + 2] = -2.*Sum_al_1[2][0];
593 m_D[0][i * KFitConst::kNumber7 + 3] = 2.*Sum_al_1[3][0];
594 m_D[0][i * KFitConst::kNumber7 + 4] = 2.*Sum_al_1[1][0] * a;
595 m_D[0][i * KFitConst::kNumber7 + 5] = -2.*Sum_al_1[0][0] * a;
596 m_D[0][i * KFitConst::kNumber7 + 6] = 0.;
597 }
598 }
599
600 } else
601 {
602
603 // m_FlagFitIncludingVertex == true
604 HepMatrix al_1_prime(m_al_1);
605 HepMatrix Sum_al_1(7, 1, 0);
606 std::vector<double> energy(m_TrackCount);
607 double a;
608
609 for (int i = 0; i < m_TrackCount; i++) {
610 a = m_property[i][2];
611 al_1_prime[i * KFitConst::kNumber7 + 0][0] -= a * (al_1_prime[KFitConst::kNumber7 * m_TrackCount + 1][0] - al_1_prime[i *
612 KFitConst::kNumber7 + 5][0]);
613 al_1_prime[i * KFitConst::kNumber7 + 1][0] += a * (al_1_prime[KFitConst::kNumber7 * m_TrackCount + 0][0] - al_1_prime[i *
614 KFitConst::kNumber7 + 4][0]);
615 energy[i] = sqrt(al_1_prime[i * KFitConst::kNumber7 + 0][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] +
616 al_1_prime[i * KFitConst::kNumber7 + 1][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] +
617 al_1_prime[i * KFitConst::kNumber7 + 2][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] +
618 m_property[i][1] * m_property[i][1]);
619 Sum_al_1[6][0] = + a;
620 }
621
622 for (int i = 0; i < m_TrackCount; i++) {
623 if (energy[i] == 0) {
624 m_ErrorCode = KFitError::kDivisionByZero;
625 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
626 break;
627 }
628
629 if (m_IsFixMass[i]) {
630 double invE = 1. / energy[i];
631 Sum_al_1[3][0] += energy[i];
632 Sum_al_1[4][0] += al_1_prime[i * KFitConst::kNumber7 + 1][0] * m_property[i][2] * invE;
633 Sum_al_1[5][0] += al_1_prime[i * KFitConst::kNumber7 + 0][0] * m_property[i][2] * invE;
634 } else {
635 Sum_al_1[3][0] += al_1_prime[i * KFitConst::kNumber7 + 3][0];
636 }
637
638 for (int j = 0; j < 3; j++) Sum_al_1[j][0] += al_1_prime[i * KFitConst::kNumber7 + j][0];
639 }
640
641 m_d[0][0] =
642 + Sum_al_1[3][0] * Sum_al_1[3][0] - Sum_al_1[0][0] * Sum_al_1[0][0]
643 - Sum_al_1[1][0] * Sum_al_1[1][0] - Sum_al_1[2][0] * Sum_al_1[2][0]
644 - m_InvariantMass * m_InvariantMass;
645
646 for (int i = 0; i < m_TrackCount; i++) {
647 if (energy[i] == 0) {
648 m_ErrorCode = KFitError::kDivisionByZero;
649 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
650 break;
651 }
652
653 a = m_property[i][2];
654
655 if (m_IsFixMass[i]) {
656 double invE = 1. / energy[i];
657 m_D[0][i * KFitConst::kNumber7 + 0] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE - Sum_al_1[0][0]);
658 m_D[0][i * KFitConst::kNumber7 + 1] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE - Sum_al_1[1][0]);
659 m_D[0][i * KFitConst::kNumber7 + 2] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] * invE - Sum_al_1[2][0]);
660 m_D[0][i * KFitConst::kNumber7 + 3] = 0.;
661 m_D[0][i * KFitConst::kNumber7 + 4] = -2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE - Sum_al_1[1][0]) * a;
662 m_D[0][i * KFitConst::kNumber7 + 5] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE - Sum_al_1[0][0]) * a;
663 m_D[0][i * KFitConst::kNumber7 + 6] = 0.;
664 } else {
665 m_D[0][i * KFitConst::kNumber7 + 0] = -2.*Sum_al_1[0][0];
666 m_D[0][i * KFitConst::kNumber7 + 1] = -2.*Sum_al_1[1][0];
667 m_D[0][i * KFitConst::kNumber7 + 2] = -2.*Sum_al_1[2][0];
668 m_D[0][i * KFitConst::kNumber7 + 3] = 2.*Sum_al_1[3][0];
669 m_D[0][i * KFitConst::kNumber7 + 4] = 2.*Sum_al_1[1][0] * a;
670 m_D[0][i * KFitConst::kNumber7 + 5] = -2.*Sum_al_1[0][0] * a;
671 m_D[0][i * KFitConst::kNumber7 + 6] = 0.;
672 }
673 }
674
675 m_D[0][KFitConst::kNumber7 * m_TrackCount + 0] = 2.*(Sum_al_1[3][0] * Sum_al_1[4][0] - Sum_al_1[1][0] * Sum_al_1[6][0]);
676 m_D[0][KFitConst::kNumber7 * m_TrackCount + 1] = -2.*(Sum_al_1[3][0] * Sum_al_1[5][0] - Sum_al_1[0][0] * Sum_al_1[6][0]);
677 m_D[0][KFitConst::kNumber7 * m_TrackCount + 2] = 0.;
678 }
679
680 return m_ErrorCode = KFitError::kNoError;
681}
Belle2::analysis::KFitBase::m_property
CLHEP::HepMatrix m_property
Container of charges and masses.
Definition: KFitBase.h:263
Belle2::sqrt
double sqrt(double a)
sqrt for double
Definition: beamHelpers.h:28

◆ makeError1() [1/2]

const HepSymMatrix makeError1 ( const CLHEP::HepLorentzVector &  p,
const CLHEP::HepMatrix &  e 
) const
protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters
pLorentz vector
e(6x6) error matrix
Returns
(7x7) error matrix

Definition at line 221 of file KFitBase.cc.

222{
223 // self track
224 // Error(6x6,e) ==> Error(7x7,output(hsm)) using Momentum(p).
225
226 if (!isNonZeroEnergy(p)) return HepSymMatrix(KFitConst::kNumber7, 0);
227
228 HepSymMatrix hsm(KFitConst::kNumber7, 0);
229
230 for (int i = 0; i < 3; i++) for (int j = i; j < 3; j++) {
231 hsm[i][j] = e[i][j];
232 hsm[4 + i][4 + j] = e[3 + i][3 + j];
233 }
234 for (int i = 0; i < 3; i++) for (int j = 0; j < 3; j++) {
235 hsm[i][4 + j] = e[i][3 + j];
236 }
237
238 const double invE = 1 / p.t();
239 hsm[0][3] = (p.x() * hsm[0][0] + p.y() * hsm[0][1] + p.z() * hsm[0][2]) * invE;
240 hsm[1][3] = (p.x() * hsm[0][1] + p.y() * hsm[1][1] + p.z() * hsm[1][2]) * invE;
241 hsm[2][3] = (p.x() * hsm[0][2] + p.y() * hsm[1][2] + p.z() * hsm[2][2]) * invE;
242 hsm[3][3] = (p.x() * p.x() * hsm[0][0] + p.y() * p.y() * hsm[1][1] + p.z() * p.z() * hsm[2][2]
243 + 2.0 * p.x() * p.y() * hsm[0][1]
244 + 2.0 * p.x() * p.z() * hsm[0][2]
245 + 2.0 * p.y() * p.z() * hsm[1][2]) * invE * invE;
246 hsm[3][4] = (p.x() * hsm[0][4] + p.y() * hsm[1][4] + p.z() * hsm[2][4]) * invE;
247 hsm[3][5] = (p.x() * hsm[0][5] + p.y() * hsm[1][5] + p.z() * hsm[2][5]) * invE;
248 hsm[3][6] = (p.x() * hsm[0][6] + p.y() * hsm[1][6] + p.z() * hsm[2][6]) * invE;
249
250 return hsm;
251}
Belle2::analysis::KFitBase::isNonZeroEnergy
bool isNonZeroEnergy(const CLHEP::HepLorentzVector &p) const
Check if the energy is non-zero.
Definition: KFitBase.cc:750

◆ makeError1() [2/2]

const HepMatrix makeError1 ( const CLHEP::HepLorentzVector &  p1,
const CLHEP::HepLorentzVector &  p2,
const CLHEP::HepMatrix &  e 
) const
protectedinherited

Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.

Parameters
p1first Lorentz vector
p2second Lorentz vector
e(6x6) error matrix
Returns
(7x7) error matrix

Definition at line 255 of file KFitBase.cc.

256{
257 // track and track
258 // Error(6x6,e) ==> Error(7x7,output(hm)) using Momentum(p1&p2).
259
260 if (!isNonZeroEnergy(p1)) return HepSymMatrix(KFitConst::kNumber7, 0);
261 if (!isNonZeroEnergy(p2)) return HepSymMatrix(KFitConst::kNumber7, 0);
262
263 HepMatrix hm(KFitConst::kNumber7, KFitConst::kNumber7, 0);
264
265 for (int i = 0; i < 3; i++) for (int j = 0; j < 3; j++) {
266 hm[i][j] = e[i][j];
267 hm[4 + i][4 + j] = e[3 + i][3 + j];
268 hm[4 + i][j] = e[3 + i][j];
269 hm[i][4 + j] = e[i][3 + j];
270 }
271
272 const double invE1 = 1 / p1.t();
273 const double invE2 = 1 / p2.t();
274 hm[0][3] = (p2.x() * hm[0][0] + p2.y() * hm[0][1] + p2.z() * hm[0][2]) * invE2;
275 hm[1][3] = (p2.x() * hm[1][0] + p2.y() * hm[1][1] + p2.z() * hm[1][2]) * invE2;
276 hm[2][3] = (p2.x() * hm[2][0] + p2.y() * hm[2][1] + p2.z() * hm[2][2]) * invE2;
277 hm[4][3] = (p2.x() * hm[4][0] + p2.y() * hm[4][1] + p2.z() * hm[4][2]) * invE2;
278 hm[5][3] = (p2.x() * hm[5][0] + p2.y() * hm[5][1] + p2.z() * hm[5][2]) * invE2;
279 hm[6][3] = (p2.x() * hm[6][0] + p2.y() * hm[6][1] + p2.z() * hm[6][2]) * invE2;
280 hm[3][3] = (p1.x() * p2.x() * hm[0][0] + p1.y() * p2.y() * hm[1][1] + p1.z() * p2.z() * hm[2][2] +
281 p1.x() * p2.y() * hm[0][1] + p2.x() * p1.y() * hm[1][0] +
282 p1.x() * p2.z() * hm[0][2] + p2.x() * p1.z() * hm[2][0] +
283 p1.y() * p2.z() * hm[1][2] + p2.y() * p1.z() * hm[2][1]) * invE1 * invE2;
284 hm[3][0] = (p1.x() * hm[0][0] + p1.y() * hm[1][0] + p1.z() * hm[2][0]) * invE1;
285 hm[3][1] = (p1.x() * hm[0][1] + p1.y() * hm[1][1] + p1.z() * hm[2][1]) * invE1;
286 hm[3][2] = (p1.x() * hm[0][2] + p1.y() * hm[1][2] + p1.z() * hm[2][2]) * invE1;
287 hm[3][4] = (p1.x() * hm[0][4] + p1.y() * hm[1][4] + p1.z() * hm[2][4]) * invE1;
288 hm[3][5] = (p1.x() * hm[0][5] + p1.y() * hm[1][5] + p1.z() * hm[2][5]) * invE1;
289 hm[3][6] = (p1.x() * hm[0][6] + p1.y() * hm[1][6] + p1.z() * hm[2][6]) * invE1;
290
291 return hm;
292}

◆ makeError2()

const HepMatrix makeError2 ( const CLHEP::HepLorentzVector &  p,
const CLHEP::HepMatrix &  e 
) const
protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters
pLorentz vector
e(3x6) error matrix
Returns
(3x7) error matrix

Definition at line 296 of file KFitBase.cc.

297{
298 // vertex and track
299 // Error(3x6,e) ==> Error(3x7,output(hm)) using Momentum(p).
300
301 if (!isNonZeroEnergy(p)) return HepSymMatrix(KFitConst::kNumber7, 0);
302
303 HepMatrix hm(3, KFitConst::kNumber7, 0);
304
305 for (int i = 0; i < 3; i++) for (int j = 0; j < 3; j++) {
306 hm[i][j] = e[i][j];
307 hm[i][4 + j] = e[i][3 + j];
308 }
309
310 const double invE = 1 / p.t();
311 hm[0][3] = (p.x() * hm[0][0] + p.y() * hm[0][1] + p.z() * hm[0][2]) * invE;
312 hm[1][3] = (p.x() * hm[1][0] + p.y() * hm[1][1] + p.z() * hm[1][2]) * invE;
313 hm[2][3] = (p.x() * hm[2][0] + p.y() * hm[2][1] + p.z() * hm[2][2]) * invE;
314
315 return hm;
316}

◆ makeError3() [1/2]

const HepSymMatrix makeError3 ( const CLHEP::HepLorentzVector &  p,
const CLHEP::HepMatrix &  e,
const bool  is_fix_mass 
) const
protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters
pLorentz vector
e(7x7) error matrix
is_fix_masstrue to recalculate energy term from other parameters, false to do nothing
Returns
(7x7) error matrix

Definition at line 320 of file KFitBase.cc.

321{
322 // self track
323 // Error(7x7,e) ==> Error(7x7,output(hsm)) using Momentum(p).
324 // is_fix_mass = 1 : Energy term is recalculated from the other parameters.
325 // is_fix_mass = 0 : hsm = e.
326
327 if (!isNonZeroEnergy(p)) return HepSymMatrix(KFitConst::kNumber7, 0);
328
329 if (!is_fix_mass) {
330 HepSymMatrix hsm(KFitConst::kNumber7, 0);
331 for (int i = 0; i < 7; i++) for (int j = i; j < 7; j++) {
332 hsm[i][j] = e[i][j];
333 }
334 return hsm;
335 }
336
337 HepSymMatrix hsm(KFitConst::kNumber7, 0);
338
339 for (int i = 0; i < 7; i++) {
340 if (i != 3)
341 for (int j = i; j < 7; j++) hsm[i][j] = e[i][j];
342 }
343
344 double invE = 1 / p.t();
345 hsm[0][3] = (p.x() * hsm[0][0] + p.y() * hsm[0][1] + p.z() * hsm[0][2]) * invE;
346 hsm[1][3] = (p.x() * hsm[0][1] + p.y() * hsm[1][1] + p.z() * hsm[1][2]) * invE;
347 hsm[2][3] = (p.x() * hsm[0][2] + p.y() * hsm[1][2] + p.z() * hsm[2][2]) * invE;
348 hsm[3][3] = (p.x() * p.x() * hsm[0][0] + p.y() * p.y() * hsm[1][1] + p.z() * p.z() * hsm[2][2]
349 + 2.0 * p.x() * p.y() * hsm[0][1]
350 + 2.0 * p.x() * p.z() * hsm[0][2]
351 + 2.0 * p.y() * p.z() * hsm[1][2]) * invE * invE;
352 hsm[3][4] = (p.x() * hsm[0][4] + p.y() * hsm[1][4] + p.z() * hsm[2][4]) * invE;
353 hsm[3][5] = (p.x() * hsm[0][5] + p.y() * hsm[1][5] + p.z() * hsm[2][5]) * invE;
354 hsm[3][6] = (p.x() * hsm[0][6] + p.y() * hsm[1][6] + p.z() * hsm[2][6]) * invE;
355
356 return hsm;
357}

◆ makeError3() [2/2]

const HepMatrix makeError3 ( const CLHEP::HepLorentzVector &  p1,
const CLHEP::HepLorentzVector &  p2,
const CLHEP::HepMatrix &  e,
const bool  is_fix_mass1,
const bool  is_fix_mass2 
) const
protectedinherited

Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.

Parameters
p1first Lorentz vector
p2second Lorentz vector
e(7x7) error matrix
is_fix_mass1true to recalculate energy term from other parameters, false to do nothing
is_fix_mass2true to recalculate energy term from other parameters, false to do nothing
Returns
(7x7) error matrix

Definition at line 361 of file KFitBase.cc.

364{
365 // track and track
366 // Error(7x7,e) ==> Error(7x7,output(hm)) using Momentum(p1&p2).
367 // is_fix_mass = 1 : Energy term is recalculated from the other parameters.
368 // is_fix_mass = 0 : not.
369
370 if (is_fix_mass1 && is_fix_mass2) {
371 if (!isNonZeroEnergy(p1)) return HepSymMatrix(KFitConst::kNumber7, 0);
372 if (!isNonZeroEnergy(p2)) return HepSymMatrix(KFitConst::kNumber7, 0);
373
374 HepMatrix hm(e);
375
376 const double invE1 = 1 / p1.t();
377 const double invE2 = 1 / p2.t();
378 hm[0][3] = (p2.x() * hm[0][0] + p2.y() * hm[0][1] + p2.z() * hm[0][2]) * invE2;
379 hm[1][3] = (p2.x() * hm[1][0] + p2.y() * hm[1][1] + p2.z() * hm[1][2]) * invE2;
380 hm[2][3] = (p2.x() * hm[2][0] + p2.y() * hm[2][1] + p2.z() * hm[2][2]) * invE2;
381 hm[4][3] = (p2.x() * hm[4][0] + p2.y() * hm[4][1] + p2.z() * hm[4][2]) * invE2;
382 hm[5][3] = (p2.x() * hm[5][0] + p2.y() * hm[5][1] + p2.z() * hm[5][2]) * invE2;
383 hm[6][3] = (p2.x() * hm[6][0] + p2.y() * hm[6][1] + p2.z() * hm[6][2]) * invE2;
384 hm[3][0] = (p1.x() * hm[0][0] + p1.y() * hm[1][0] + p1.z() * hm[2][0]) * invE1;
385 hm[3][1] = (p1.x() * hm[0][1] + p1.y() * hm[1][1] + p1.z() * hm[2][1]) * invE1;
386 hm[3][2] = (p1.x() * hm[0][2] + p1.y() * hm[1][2] + p1.z() * hm[2][2]) * invE1;
387 hm[3][3] = (p1.x() * p2.x() * hm[0][0] + p1.y() * p2.y() * hm[1][1] + p1.z() * p2.z() * hm[2][2] +
388 p1.x() * p2.y() * hm[0][1] + p2.x() * p1.y() * hm[1][0] +
389 p1.x() * p2.z() * hm[0][2] + p2.x() * p1.z() * hm[2][0] +
390 p1.y() * p2.z() * hm[1][2] + p2.y() * p1.z() * hm[2][1]) * invE1 * invE2;
391 hm[3][4] = (p1.x() * hm[0][4] + p1.y() * hm[1][4] + p1.z() * hm[2][4]) * invE1;
392 hm[3][5] = (p1.x() * hm[0][5] + p1.y() * hm[1][5] + p1.z() * hm[2][5]) * invE1;
393 hm[3][6] = (p1.x() * hm[0][6] + p1.y() * hm[1][6] + p1.z() * hm[2][6]) * invE1;
394
395 return hm;
396 }
397
398
399 if (is_fix_mass1 && !is_fix_mass2) {
400 if (!isNonZeroEnergy(p1)) return HepSymMatrix(KFitConst::kNumber7, 0);
401
402 HepMatrix hm(e);
403
404 const double invE1 = 1 / p1.t();
405 hm[3][0] = (p1.x() * hm[0][0] + p1.y() * hm[1][0] + p1.z() * hm[2][0]) * invE1;
406 hm[3][1] = (p1.x() * hm[0][1] + p1.y() * hm[1][1] + p1.z() * hm[2][1]) * invE1;
407 hm[3][2] = (p1.x() * hm[0][2] + p1.y() * hm[1][2] + p1.z() * hm[2][2]) * invE1;
408 hm[3][3] = (p1.x() * hm[0][3] + p1.y() * hm[1][3] + p1.z() * hm[2][3]) * invE1;
409 hm[3][4] = (p1.x() * hm[0][4] + p1.y() * hm[1][4] + p1.z() * hm[2][4]) * invE1;
410 hm[3][5] = (p1.x() * hm[0][5] + p1.y() * hm[1][5] + p1.z() * hm[2][5]) * invE1;
411 hm[3][6] = (p1.x() * hm[0][6] + p1.y() * hm[1][6] + p1.z() * hm[2][6]) * invE1;
412
413 return hm;
414 }
415
416
417 if (!is_fix_mass1 && is_fix_mass2) {
418 if (!isNonZeroEnergy(p2)) return HepSymMatrix(KFitConst::kNumber7, 0);
419
420 HepMatrix hm(e);
421
422 const double invE2 = 1 / p2.t();
423 hm[0][3] = (p2.x() * hm[0][0] + p2.y() * hm[0][1] + p2.z() * hm[0][2]) * invE2;
424 hm[1][3] = (p2.x() * hm[1][0] + p2.y() * hm[1][1] + p2.z() * hm[1][2]) * invE2;
425 hm[2][3] = (p2.x() * hm[2][0] + p2.y() * hm[2][1] + p2.z() * hm[2][2]) * invE2;
426 hm[3][3] = (p2.x() * hm[3][0] + p2.y() * hm[3][1] + p2.z() * hm[3][2]) * invE2;
427 hm[4][3] = (p2.x() * hm[4][0] + p2.y() * hm[4][1] + p2.z() * hm[4][2]) * invE2;
428 hm[5][3] = (p2.x() * hm[5][0] + p2.y() * hm[5][1] + p2.z() * hm[5][2]) * invE2;
429 hm[6][3] = (p2.x() * hm[6][0] + p2.y() * hm[6][1] + p2.z() * hm[6][2]) * invE2;
430
431 return hm;
432 }
433
434 return e;
435}

◆ makeError4()

const HepMatrix makeError4 ( const CLHEP::HepLorentzVector &  p,
const CLHEP::HepMatrix &  e 
) const
protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters
pLorentz vector
e(3x7) error matrix
Returns
(7x7) error matrix

Definition at line 439 of file KFitBase.cc.

440{
441 // vertex and track
442 // Error(3x7,e) ==> Error(3x7,output(hm)) using Momentum(p).
443 // Energy term is recalculated from the other parameters.
444
445 if (!isNonZeroEnergy(p)) return HepSymMatrix(KFitConst::kNumber7, 0);
446
447 HepMatrix hm(e);
448
449 const double invE = 1 / p.t();
450 hm[0][3] = (p.x() * hm[0][0] + p.y() * hm[0][1] + p.z() * hm[0][2]) * invE;
451 hm[1][3] = (p.x() * hm[1][0] + p.y() * hm[1][1] + p.z() * hm[1][2]) * invE;
452 hm[2][3] = (p.x() * hm[2][0] + p.y() * hm[2][1] + p.z() * hm[2][2]) * invE;
453
454 return hm;
455}

◆ prepareCorrelation()

enum KFitError::ECode prepareCorrelation ( void  )
overrideprivatevirtual

Build a grand correlation matrix from input-track properties.

Returns
error code (zero if success)

Reimplemented from KFitBase.

Definition at line 416 of file MassFitKFit.cc.

416 {
417 if (m_BeforeCorrelation.size() != static_cast<unsigned int>(m_TrackCount * (m_TrackCount - 1) / 2))
418 {
419 m_ErrorCode = KFitError::kBadCorrelationSize;
420 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
421 return m_ErrorCode;
422 }
423
424 int row = 0, col = 0;
425
426 for (auto& hm : m_BeforeCorrelation)
427 {
428 // counter
429 row++;
430 if (row == m_TrackCount) {
431 col++;
432 row = col + 1;
433 }
434
435 int ii = 0, jj = 0;
436 for (int i = KFitConst::kNumber7 * row; i < KFitConst::kNumber7 * (row + 1); i++) {
437 for (int j = KFitConst::kNumber7 * col; j < KFitConst::kNumber7 * (col + 1); j++) {
438 m_V_al_0[i][j] = hm[ii][jj];
439 jj++;
440 }
441 jj = 0;
442 ii++;
443 }
444 }
445
446 if (m_FlagFitIncludingVertex)
447 {
448 // ...error of vertex
449 m_V_al_0.sub(KFitConst::kNumber7 * m_TrackCount + 1, m_BeforeVertexError);
450
451 // ...error matrix between vertex and tracks
452 if (m_FlagTrackVertexError) {
453 if (m_BeforeTrackVertexError.size() != (unsigned int)m_TrackCount) {
454 m_ErrorCode = KFitError::kBadCorrelationSize;
455 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
456 return m_ErrorCode;
457 }
458
459 int i = 0;
460 for (auto& hm : m_BeforeTrackVertexError) {
461 for (int j = 0; j < 3; j++) for (int k = 0; k < KFitConst::kNumber7; k++) {
462 m_V_al_0[j + KFitConst::kNumber7 * m_TrackCount][k + i * KFitConst::kNumber7] = hm[j][k];
463 }
464 i++;
465 }
466 }
467 }
468
469 return m_ErrorCode = KFitError::kNoError;
470}
Belle2::analysis::KFitBase::m_BeforeCorrelation
std::vector< CLHEP::HepMatrix > m_BeforeCorrelation
Container of input correlation matrices.
Definition: KFitBase.h:251
Belle2::analysis::KFitError::kBadCorrelationSize
@ kBadCorrelationSize
Wrong correlation matrix size (internal error)
Definition: KFitError.h:51

◆ prepareInputMatrix()

enum KFitError::ECode prepareInputMatrix ( void  )
overrideprivatevirtual

Build grand matrices for minimum search from input-track properties.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 286 of file MassFitKFit.cc.

286 {
287 if (m_TrackCount > KFitConst::kMaxTrackCount)
288 {
289 m_ErrorCode = KFitError::kBadTrackSize;
290 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
291 return m_ErrorCode;
292 }
293
294
295 if (m_IsFixMass.size() == 0)
296 {
297 // If no fix_mass flag at all,
298 // all tracks are considered to be fixed at mass.
299 for (int i = 0; i < m_TrackCount; i++) this->fixMass();
300 } else if (m_IsFixMass.size() != (unsigned int)m_TrackCount)
301 {
302 m_ErrorCode = KFitError::kBadTrackSize;
303 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
304 return m_ErrorCode;
305 }
306
307
308 if (!m_FlagFitIncludingVertex)
309 {
310 int index = 0;
311 m_al_0 = HepMatrix(KFitConst::kNumber7 * m_TrackCount, 1, 0);
312 m_property = HepMatrix(m_TrackCount, 3, 0);
313 m_V_al_0 = HepSymMatrix(KFitConst::kNumber7 * m_TrackCount, 0);
314
315 for (auto& track : m_Tracks) {
316 // momentum x,y,z and position x,y,z
317 m_al_0[index * KFitConst::kNumber7 + 0][0] = track.getMomentum(KFitConst::kBeforeFit).x();
318 m_al_0[index * KFitConst::kNumber7 + 1][0] = track.getMomentum(KFitConst::kBeforeFit).y();
319 m_al_0[index * KFitConst::kNumber7 + 2][0] = track.getMomentum(KFitConst::kBeforeFit).z();
320 m_al_0[index * KFitConst::kNumber7 + 3][0] = track.getMomentum(KFitConst::kBeforeFit).t();
321 m_al_0[index * KFitConst::kNumber7 + 4][0] = track.getPosition(KFitConst::kBeforeFit).x();
322 m_al_0[index * KFitConst::kNumber7 + 5][0] = track.getPosition(KFitConst::kBeforeFit).y();
323 m_al_0[index * KFitConst::kNumber7 + 6][0] = track.getPosition(KFitConst::kBeforeFit).z();
324 // these error
325 m_V_al_0.sub(index * KFitConst::kNumber7 + 1, track.getError(KFitConst::kBeforeFit));
326 // charge, mass, a
327 m_property[index][0] = track.getCharge();
328 m_property[index][1] = track.getMass();
329 const double c = Belle2::Const::speedOfLight * 1e-4;
330 m_property[index][2] = -c * m_MagneticField * track.getCharge();
331 index++;
332 }
333
334 // error between track and track
335 if (m_FlagCorrelation) {
336 this->prepareCorrelation();
337 if (m_ErrorCode != KFitError::kNoError) {
338 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
339 return m_ErrorCode;
340 }
341 }
342
343 // set member matrix
344 m_al_1 = m_al_0;
345
346 // define size of matrix
347 m_V_al_1 = HepMatrix(KFitConst::kNumber7 * m_TrackCount, KFitConst::kNumber7 * m_TrackCount, 0);
348 m_D = m_V_al_1.sub(1, 1, 1, KFitConst::kNumber7 * m_TrackCount);
349
350 } else
351 {
352 // m_FlagFitIncludingVertex == true
353 int index = 0;
354 m_al_0 = HepMatrix(KFitConst::kNumber7 * m_TrackCount + 3, 1, 0);
355 m_property = HepMatrix(m_TrackCount, 3, 0);
356 m_V_al_0 = HepSymMatrix(KFitConst::kNumber7 * m_TrackCount + 3, 0);
357
358 for (auto& track : m_Tracks) {
359 // momentum x,y,z and position x,y,z
360 m_al_0[index * KFitConst::kNumber7 + 0][0] = track.getMomentum(KFitConst::kBeforeFit).x();
361 m_al_0[index * KFitConst::kNumber7 + 1][0] = track.getMomentum(KFitConst::kBeforeFit).y();
362 m_al_0[index * KFitConst::kNumber7 + 2][0] = track.getMomentum(KFitConst::kBeforeFit).z();
363 m_al_0[index * KFitConst::kNumber7 + 3][0] = track.getMomentum(KFitConst::kBeforeFit).t();
364 m_al_0[index * KFitConst::kNumber7 + 4][0] = track.getPosition(KFitConst::kBeforeFit).x();
365 m_al_0[index * KFitConst::kNumber7 + 5][0] = track.getPosition(KFitConst::kBeforeFit).y();
366 m_al_0[index * KFitConst::kNumber7 + 6][0] = track.getPosition(KFitConst::kBeforeFit).z();
367 // these error
368 m_V_al_0.sub(index * KFitConst::kNumber7 + 1, track.getError(KFitConst::kBeforeFit));
369 // charge, mass, a
370 m_property[index][0] = track.getCharge();
371 m_property[index][1] = track.getMass();
372 const double c = Belle2::Const::speedOfLight * 1e-4;
373 m_property[index][2] = -c * m_MagneticField * track.getCharge();
374 index++;
375 }
376
377 // vertex
378 m_al_0[KFitConst::kNumber7 * m_TrackCount + 0][0] = m_BeforeVertex.x();
379 m_al_0[KFitConst::kNumber7 * m_TrackCount + 1][0] = m_BeforeVertex.y();
380 m_al_0[KFitConst::kNumber7 * m_TrackCount + 2][0] = m_BeforeVertex.z();
381 m_V_al_0.sub(KFitConst::kNumber7 * m_TrackCount + 1, m_BeforeVertexError);
382
383 // error between track and track
384 if (m_FlagCorrelation) {
385 this->prepareCorrelation();
386 if (m_ErrorCode != KFitError::kNoError) {
387 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
388 return m_ErrorCode;
389 }
390 }
391
392 // set member matrix
393 m_al_1 = m_al_0;
394
395 // define size of matrix
396 m_V_al_1 = HepMatrix(KFitConst::kNumber7 * m_TrackCount + 3, KFitConst::kNumber7 * m_TrackCount + 3, 0);
397 m_D = m_V_al_1.sub(1, 1, 1, KFitConst::kNumber7 * m_TrackCount + 3);
398 }
399
400 return m_ErrorCode = KFitError::kNoError;
401}
Belle2::Const::speedOfLight
static const double speedOfLight
[cm/ns]
Definition: Const.h:695
Belle2::analysis::KFitBase::m_FlagCorrelation
bool m_FlagCorrelation
Flag whether a correlation among tracks exists.
Definition: KFitBase.h:306
Belle2::analysis::MassFitKFit::prepareCorrelation
enum KFitError::ECode prepareCorrelation(void) override
Build a grand correlation matrix from input-track properties.
Definition: MassFitKFit.cc:416
Belle2::analysis::MassFitKFit::fixMass
enum KFitError::ECode fixMass(void)
Tell the object to fix the last added track property at the invariant mass.
Definition: MassFitKFit.cc:84
Belle2::analysis::KFitConst::kMaxTrackCount
static const int kMaxTrackCount
Maximum track size.
Definition: KFitConst.h:40

◆ prepareInputSubMatrix()

enum KFitError::ECode prepareInputSubMatrix ( void  )
overrideprivatevirtual

Build sub-matrices for minimum search from input-track properties.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 405 of file MassFitKFit.cc.

405 { // unused
406 char buf[1024];
407 sprintf(buf, "%s:%s(): internal error; this function should never be called", __FILE__, __func__);
408 B2FATAL(buf);
409
410 /* NEVER REACHEd HERE */
411 return KFitError::kOutOfRange;
412}

◆ prepareOutputMatrix()

enum KFitError::ECode prepareOutputMatrix ( void  )
overrideprivatevirtual

Build an output error matrix.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 474 of file MassFitKFit.cc.

474 {
475 Hep3Vector h3v;
476 int index = 0;
477 for (auto& pdata : m_Tracks)
478 {
479 // tracks
480 // momentum
481 h3v.setX(m_al_1[index * KFitConst::kNumber7 + 0][0]);
482 h3v.setY(m_al_1[index * KFitConst::kNumber7 + 1][0]);
483 h3v.setZ(m_al_1[index * KFitConst::kNumber7 + 2][0]);
484 if (m_IsFixMass[index])
485 pdata.setMomentum(HepLorentzVector(h3v, sqrt(h3v.mag2() + pdata.getMass()*pdata.getMass())), KFitConst::kAfterFit);
486 else
487 pdata.setMomentum(HepLorentzVector(h3v, m_al_1[index * KFitConst::kNumber7 + 3][0]), KFitConst::kAfterFit);
488 // position
489 pdata.setPosition(HepPoint3D(
490 m_al_1[index * KFitConst::kNumber7 + 4][0],
491 m_al_1[index * KFitConst::kNumber7 + 5][0],
492 m_al_1[index * KFitConst::kNumber7 + 6][0]), KFitConst::kAfterFit);
493 // error of the tracks
494 pdata.setError(this->makeError3(pdata.getMomentum(),
495 m_V_al_1.sub(
496 index * KFitConst::kNumber7 + 1,
497 (index + 1)*KFitConst::kNumber7,
498 index * KFitConst::kNumber7 + 1,
499 (index + 1)*KFitConst::kNumber7), m_IsFixMass[index]),
500 KFitConst::kAfterFit);
501 if (m_ErrorCode != KFitError::kNoError) break;
502 index++;
503 }
504
505 if (m_FlagFitIncludingVertex)
506 {
507 // vertex
508 m_AfterVertex.setX(m_al_1[KFitConst::kNumber7 * m_TrackCount + 0][0]);
509 m_AfterVertex.setY(m_al_1[KFitConst::kNumber7 * m_TrackCount + 1][0]);
510 m_AfterVertex.setZ(m_al_1[KFitConst::kNumber7 * m_TrackCount + 2][0]);
511 // error of the vertex
512 for (int i = 0; i < 3; i++) for (int j = i; j < 3; j++) {
513 m_AfterVertexError[i][j] = m_V_al_1[KFitConst::kNumber7 * m_TrackCount + i][KFitConst::kNumber7 * m_TrackCount + j];
514 }
515 // error between vertex and tracks
516 for (int i = 0; i < m_TrackCount; i++) {
517 HepMatrix hm(3, KFitConst::kNumber7, 0);
518 for (int j = 0; j < 3; j++) for (int k = 0; k < KFitConst::kNumber7; k++) {
519 hm[j][k] = m_V_al_1[KFitConst::kNumber7 * m_TrackCount + j][KFitConst::kNumber7 * i + k];
520 }
521 if (m_IsFixMass[i])
522 m_AfterTrackVertexError.push_back(this->makeError4(m_Tracks[i].getMomentum(), hm));
523 else
524 m_AfterTrackVertexError.push_back(hm);
525 }
526 } else
527 {
528 // not fit
529 m_AfterVertex = m_BeforeVertex;
530 }
531
532 return m_ErrorCode = KFitError::kNoError;
533}
Belle2::analysis::KFitBase::makeError4
const CLHEP::HepMatrix makeError4(const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
Rebuild an error matrix from a Lorentz vector and an error matrix.
Definition: KFitBase.cc:439

◆ setCorrelation()

enum KFitError::ECode setCorrelation ( const CLHEP::HepMatrix &  c)
overridevirtual

Set a correlation matrix.

Not intended for end user's use.

Parameters
c(7x7) correlation matrix
Returns
error code (zero if success)

Reimplemented from KFitBase.

Definition at line 125 of file MassFitKFit.cc.

125 {
126 return KFitBase::setCorrelation(m);
127}
Belle2::analysis::KFitBase::setCorrelation
virtual enum KFitError::ECode setCorrelation(const CLHEP::HepMatrix &c)
Set a correlation matrix.
Definition: KFitBase.cc:70

◆ setFlagAtDecayPoint()

enum KFitError::ECode setFlagAtDecayPoint ( const bool  flag)

Set a flag if to constraint at the decay point in the mass-constraint fit.

Parameters
flagtrue for constraint, false for not
Returns
error code (zero if success)

Definition at line 76 of file MassFitKFit.cc.

76 {
77 m_FlagAtDecayPoint = flag;
78
79 return m_ErrorCode = KFitError::kNoError;
80}

◆ setInvariantMass()

enum KFitError::ECode setInvariantMass ( const double  m)

Set an invariant mass for the mass-constraint fit.

Parameters
minvariant mass
Returns
error code (zero if success)

Definition at line 68 of file MassFitKFit.cc.

68 {
69 m_InvariantMass = m;
70
71 return m_ErrorCode = KFitError::kNoError;
72}

◆ setMagneticField()

enum KFitError::ECode setMagneticField ( const double  mf)
inherited

Change a magnetic field from the default value KFitConst::kDefaultMagneticField.

Parameters
mfmagnetic field to set
Returns
error code (zero if success)

Definition at line 93 of file KFitBase.cc.

93 {
94 m_MagneticField = mf;
95
96 return m_ErrorCode = KFitError::kNoError;
97}

◆ setTrackVertexError()

enum KFitError::ECode setTrackVertexError ( const CLHEP::HepMatrix &  e)

Set a vertex error matrix of the child particle in the addTrack'ed order.

Parameters
e(3x7) vertex error matrix
Returns
error code (zero if success)

Definition at line 100 of file MassFitKFit.cc.

100 {
101 if (e.num_row() != 3 || e.num_col() != KFitConst::kNumber7)
102 {
103 m_ErrorCode = KFitError::kBadMatrixSize;
104 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
105 return m_ErrorCode;
106 }
107
108 m_BeforeTrackVertexError.push_back(e);
109 m_FlagTrackVertexError = true;
110 m_FlagFitIncludingVertex = true;
111
112 return m_ErrorCode = KFitError::kNoError;
113}

◆ setTrackZeroVertexError()

enum KFitError::ECode setTrackZeroVertexError ( void  )

Indicate no vertex uncertainty in the child particle in the addTrack'ed order.

Returns
error code (zero if success)

Definition at line 117 of file MassFitKFit.cc.

117 {
118 HepMatrix zero(3, KFitConst::kNumber7, 0);
119
120 return this->setTrackVertexError(zero);
121}
Belle2::analysis::MassFitKFit::setTrackVertexError
enum KFitError::ECode setTrackVertexError(const CLHEP::HepMatrix &e)
Set a vertex error matrix of the child particle in the addTrack'ed order.
Definition: MassFitKFit.cc:100

◆ setVertex()

enum KFitError::ECode setVertex ( const HepPoint3D &  v)

Set an initial vertex position for the mass-constraint fit.

Parameters
vvertex position
Returns
error code (zero if success)

Definition at line 44 of file MassFitKFit.cc.

44 {
45 m_BeforeVertex = v;
46
47 return m_ErrorCode = KFitError::kNoError;
48}

◆ setVertexError()

enum KFitError::ECode setVertexError ( const CLHEP::HepSymMatrix &  e)

Set an initial vertex error matrix for the mass-constraint fit.

Parameters
evertex error matrix
Returns
error code (zero if success)

Definition at line 52 of file MassFitKFit.cc.

52 {
53 if (e.num_row() != 3)
54 {
55 m_ErrorCode = KFitError::kBadMatrixSize;
56 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
57 return m_ErrorCode;
58 }
59
60 m_BeforeVertexError = e;
61 m_FlagFitIncludingVertex = true;
62
63 return m_ErrorCode = KFitError::kNoError;
64}

◆ setZeroCorrelation()

enum KFitError::ECode setZeroCorrelation ( void  )
overridevirtual

Indicate no correlation between tracks.

Not intended for end user's use.

Returns
error code (zero if success)

Reimplemented from KFitBase.

Definition at line 131 of file MassFitKFit.cc.

131 {
132 return KFitBase::setZeroCorrelation();
133}
Belle2::analysis::KFitBase::setZeroCorrelation
virtual enum KFitError::ECode setZeroCorrelation(void)
Indicate no correlation between tracks.
Definition: KFitBase.cc:85

◆ unfixMass()

enum KFitError::ECode unfixMass ( void  )

Tell the object to unfix the last added track property at the invariant mass.

Not intended for end user's use.

Returns
error code (zero if success)

Definition at line 92 of file MassFitKFit.cc.

92 {
93 m_IsFixMass.push_back(false);
94
95 return m_ErrorCode = KFitError::kNoError;
96}

◆ updateMother()

enum KFitError::ECode updateMother ( Particle *  mother)

Update mother particle.

Parameters
[in]motherMother particle.

Definition at line 691 of file MassFitKFit.cc.

692{
693 MakeMotherKFit kmm;
694 kmm.setMagneticField(m_MagneticField);
695 unsigned n = getTrackCount();
696 for (unsigned i = 0; i < n; ++i) {
697 kmm.addTrack(getTrackMomentum(i), getTrackPosition(i), getTrackError(i),
698 getTrack(i).getCharge());
699 if (getFlagFitWithVertex())
700 kmm.setTrackVertexError(getTrackVertexError(i));
701 for (unsigned j = i + 1; j < n; ++j) {
702 kmm.setCorrelation(getCorrelation(i, j));
703 }
704 }
705 kmm.setVertex(getVertex());
706 if (getFlagFitWithVertex())
707 kmm.setVertexError(getVertexError());
708 m_ErrorCode = kmm.doMake();
709 if (m_ErrorCode != KFitError::kNoError)
710 return m_ErrorCode;
711 double chi2 = getCHIsq();
712 int ndf = getNDF();
713 double prob = TMath::Prob(chi2, ndf);
714 //
715 bool haschi2 = mother->hasExtraInfo("chiSquared");
716 if (haschi2) {
717 mother->setExtraInfo("chiSquared", chi2);
718 mother->setExtraInfo("ndf", ndf);
719 } else {
720 mother->addExtraInfo("chiSquared", chi2);
721 mother->addExtraInfo("ndf", ndf);
722 }
723
724 mother->updateMomentum(
725 CLHEPToROOT::getLorentzVector(kmm.getMotherMomentum()),
726 CLHEPToROOT::getXYZVector(kmm.getMotherPosition()),
727 CLHEPToROOT::getTMatrixFSym(kmm.getMotherError()),
728 prob);
729 m_ErrorCode = KFitError::kNoError;
730 return m_ErrorCode;
731}
Belle2::Particle::setExtraInfo
void setExtraInfo(const std::string &name, double value)
Sets the user-defined data of given name to the given value.
Definition: Particle.cc:1317
Belle2::Particle::hasExtraInfo
bool hasExtraInfo(const std::string &name) const
Return whether the extra info with the given name is set.
Definition: Particle.cc:1266
Belle2::Particle::addExtraInfo
void addExtraInfo(const std::string &name, double value)
Sets the user-defined data of given name to the given value.
Definition: Particle.cc:1336
Belle2::Particle::updateMomentum
void updateMomentum(const ROOT::Math::PxPyPzEVector &p4, const ROOT::Math::XYZVector &vertex, const TMatrixFSym &errMatrix, double pValue)
Sets Lorentz vector, position, 7x7 error matrix and p-value.
Definition: Particle.h:386
Belle2::analysis::KFitBase::getTrackError
const CLHEP::HepSymMatrix getTrackError(const int id) const
Get an error matrix of the track.
Definition: KFitBase.cc:168
Belle2::analysis::KFitBase::getTrackPosition
const HepPoint3D getTrackPosition(const int id) const
Get a position of the track.
Definition: KFitBase.cc:161
Belle2::analysis::KFitBase::getNDF
virtual int getNDF(void) const
Get an NDF of the fit.
Definition: KFitBase.cc:114
Belle2::analysis::KFitBase::getTrack
const KFitTrack getTrack(const int id) const
Get a specified track object.
Definition: KFitBase.cc:175
Belle2::analysis::KFitBase::getTrackCount
int getTrackCount(void) const
Get the number of added tracks.
Definition: KFitBase.cc:107
Belle2::analysis::MakeMotherKFit
MakeMotherKFit is a class to build mother particle from kinematically fitted daughters.
Definition: MakeMotherKFit.h:40
Belle2::analysis::MakeMotherKFit::setVertex
enum KFitError::ECode setVertex(const HepPoint3D &v)
Set a vertex position of the mother particle.
Definition: MakeMotherKFit.cc:71
Belle2::analysis::MakeMotherKFit::addTrack
enum KFitError::ECode addTrack(const KFitTrack &kp)
Add a track to the make-mother object.
Definition: MakeMotherKFit.cc:39
Belle2::analysis::MakeMotherKFit::doMake
enum KFitError::ECode doMake(void)
Perform a reconstruction of mother particle.
Definition: MakeMotherKFit.cc:192
Belle2::analysis::MakeMotherKFit::getMotherError
const CLHEP::HepSymMatrix getMotherError(void) const
Get an error matrix of the mother particle.
Definition: MakeMotherKFit.cc:185
Belle2::analysis::MakeMotherKFit::setCorrelation
enum KFitError::ECode setCorrelation(const CLHEP::HepMatrix &e)
Set a correlation matrix.
Definition: MakeMotherKFit.cc:119
Belle2::analysis::MakeMotherKFit::getMotherPosition
const HepPoint3D getMotherPosition(void) const
Get a position of the mother particle.
Definition: MakeMotherKFit.cc:178
Belle2::analysis::MakeMotherKFit::setVertexError
enum KFitError::ECode setVertexError(const CLHEP::HepSymMatrix &e)
Set a vertex error matrix of the mother particle.
Definition: MakeMotherKFit.cc:79
Belle2::analysis::MakeMotherKFit::setTrackVertexError
enum KFitError::ECode setTrackVertexError(const CLHEP::HepMatrix &e)
Set a vertex error matrix of the child particle in the addTrack'ed order.
Definition: MakeMotherKFit.cc:95
Belle2::analysis::MakeMotherKFit::getMotherMomentum
const CLHEP::HepLorentzVector getMotherMomentum(void) const
Get a Lorentz vector of the mother particle.
Definition: MakeMotherKFit.cc:171
Belle2::analysis::MakeMotherKFit::setMagneticField
enum KFitError::ECode setMagneticField(const double mf)
Change a magnetic field from the default value KFitConst::kDefaultMagneticField.
Definition: MakeMotherKFit.cc:63
Belle2::analysis::MassFitKFit::getFlagFitWithVertex
bool getFlagFitWithVertex(void) const
Get a flag if the fit is allowed with moving the vertex position.
Definition: MassFitKFit.cc:186
Belle2::analysis::MassFitKFit::getCHIsq
double getCHIsq(void) const override
Get a chi-square of the fit.
Definition: MassFitKFit.cc:193
Belle2::analysis::MassFitKFit::getCorrelation
const CLHEP::HepMatrix getCorrelation(const int id1, const int id2, const int flag=KFitConst::kAfterFit) const override
Get a correlation matrix between two tracks.
Definition: MassFitKFit.cc:253
Belle2::analysis::MassFitKFit::getVertexError
const CLHEP::HepSymMatrix getVertexError(const int flag=KFitConst::kAfterFit) const
Get a vertex error matrix.
Definition: MassFitKFit.cc:156
Belle2::analysis::MassFitKFit::getVertex
const HepPoint3D getVertex(const int flag=KFitConst::kAfterFit) const
Get a vertex position.
Definition: MassFitKFit.cc:137
Belle2::analysis::MassFitKFit::getTrackVertexError
const CLHEP::HepMatrix getTrackVertexError(const int id, const int flag=KFitConst::kAfterFit) const
Get a vertex error matrix of the track.
Definition: MassFitKFit.cc:200

Member Data Documentation

◆ m_AfterTrackVertexError

std::vector<CLHEP::HepMatrix> m_AfterTrackVertexError
private

array of vertex error matrices after the fit.

Definition at line 153 of file MassFitKFit.h.

◆ m_AfterVertex

HepPoint3D m_AfterVertex
private

Vertex position after the fit.

Definition at line 149 of file MassFitKFit.h.

◆ m_AfterVertexError

CLHEP::HepSymMatrix m_AfterVertexError
private

Vertex error matrix after the fit.

Definition at line 151 of file MassFitKFit.h.

◆ m_al_0

CLHEP::HepMatrix m_al_0
protectedinherited

See J.Tanaka Ph.D (2001) p136 for definition.

Definition at line 257 of file KFitBase.h.

◆ m_al_1

CLHEP::HepMatrix m_al_1
protectedinherited

See J.Tanaka Ph.D (2001) p136 for definition.

Definition at line 259 of file KFitBase.h.

◆ m_al_a

CLHEP::HepMatrix m_al_a
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 261 of file KFitBase.h.

◆ m_BeforeCorrelation

std::vector<CLHEP::HepMatrix> m_BeforeCorrelation
protectedinherited

Container of input correlation matrices.

Definition at line 251 of file KFitBase.h.

◆ m_BeforeTrackVertexError

std::vector<CLHEP::HepMatrix> m_BeforeTrackVertexError
private

array of vertex error matrices before the fit.

Definition at line 146 of file MassFitKFit.h.

◆ m_BeforeVertex

HepPoint3D m_BeforeVertex
private

Vertex position before the fit.

Definition at line 142 of file MassFitKFit.h.

◆ m_BeforeVertexError

CLHEP::HepSymMatrix m_BeforeVertexError
private

Vertex error matrix before the fit.

Definition at line 144 of file MassFitKFit.h.

◆ m_CHIsq

double m_CHIsq
protectedinherited

chi-square of the fit.

Definition at line 297 of file KFitBase.h.

◆ m_Cov_v_al_1

CLHEP::HepMatrix m_Cov_v_al_1
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 291 of file KFitBase.h.

◆ m_D

CLHEP::HepMatrix m_D
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 266 of file KFitBase.h.

◆ m_d

CLHEP::HepMatrix m_d
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 268 of file KFitBase.h.

◆ m_E

CLHEP::HepMatrix m_E
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 279 of file KFitBase.h.

◆ m_ErrorCode

enum KFitError::ECode m_ErrorCode
protectedinherited

Error code.

Definition at line 243 of file KFitBase.h.

◆ m_FlagAtDecayPoint

bool m_FlagAtDecayPoint
private

Flag controlled by setFlagAtDecayPoint().

Definition at line 160 of file MassFitKFit.h.

◆ m_FlagCorrelation

bool m_FlagCorrelation
protectedinherited

Flag whether a correlation among tracks exists.

Definition at line 306 of file KFitBase.h.

◆ m_FlagFitIncludingVertex

bool m_FlagFitIncludingVertex
private

Flag to indicate if the fit is allowed with moving the vertex position.

Definition at line 158 of file MassFitKFit.h.

◆ m_FlagFitted

bool m_FlagFitted
protectedinherited

Flag to indicate if the fit is performed and succeeded.

Definition at line 245 of file KFitBase.h.

◆ m_FlagOverIteration

bool m_FlagOverIteration
protectedinherited

Flag whether the iteration count exceeds the limit.

Definition at line 308 of file KFitBase.h.

◆ m_FlagTrackVertexError

bool m_FlagTrackVertexError
private

Flag to indicate if the vertex error matrix of the child particle is preset.

Definition at line 156 of file MassFitKFit.h.

◆ m_InvariantMass

double m_InvariantMass
private

Invariant mass.

Definition at line 163 of file MassFitKFit.h.

◆ m_IsFixMass

std::vector<int> m_IsFixMass
private

Array of flags whether the track property is fixed at the mass.

Definition at line 165 of file MassFitKFit.h.

◆ m_lam

CLHEP::HepMatrix m_lam
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 276 of file KFitBase.h.

◆ m_lam0

CLHEP::HepMatrix m_lam0
protectedinherited

See J.Tanaka Ph.D (2001) p138 for definition.

Definition at line 283 of file KFitBase.h.

◆ m_MagneticField

double m_MagneticField
protectedinherited

Magnetic field.

Definition at line 311 of file KFitBase.h.

◆ m_NDF

int m_NDF
protectedinherited

NDF of the fit.

Definition at line 295 of file KFitBase.h.

◆ m_NecessaryTrackCount

int m_NecessaryTrackCount
protectedinherited

Number needed tracks to perform fit.

Definition at line 303 of file KFitBase.h.

◆ m_property

CLHEP::HepMatrix m_property
protectedinherited

Container of charges and masses.

Definition at line 263 of file KFitBase.h.

◆ m_TrackCount

int m_TrackCount
protectedinherited

Number of tracks.

Definition at line 301 of file KFitBase.h.

◆ m_Tracks

std::vector<KFitTrack> m_Tracks
protectedinherited

Container of input tracks.

Definition at line 249 of file KFitBase.h.

◆ m_v

CLHEP::HepMatrix m_v
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 285 of file KFitBase.h.

◆ m_v_a

CLHEP::HepMatrix m_v_a
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 287 of file KFitBase.h.

◆ m_V_al_0

CLHEP::HepSymMatrix m_V_al_0
protectedinherited

See J.Tanaka Ph.D (2001) p137 for definition.

Definition at line 255 of file KFitBase.h.

◆ m_V_al_1

CLHEP::HepMatrix m_V_al_1
protectedinherited

See J.Tanaka Ph.D (2001) p138 for definition.

Definition at line 274 of file KFitBase.h.

◆ m_V_D

CLHEP::HepMatrix m_V_D
protectedinherited

See J.Tanaka Ph.D (2001) p138 for definition.

Definition at line 271 of file KFitBase.h.

◆ m_V_Dt

CLHEP::HepMatrix m_V_Dt
protectedinherited

See J.Tanaka Ph.D (2001) p138 for definition.

Definition at line 289 of file KFitBase.h.

◆ m_V_E

CLHEP::HepMatrix m_V_E
protectedinherited

See J.Tanaka Ph.D (2001) p138 for definition.

Definition at line 281 of file KFitBase.h.

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