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MassVertexFitKFit Class Reference

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

#include <MassVertexFitKFit.h>

Inheritance diagram for MassVertexFitKFit:
KFitBase

Public Member Functions

 MassVertexFitKFit (void)
 Construct an object with no argument.
 
 ~MassVertexFitKFit (void) override
 Destruct the object.
 
enum KFitError::ECode setInitialVertex (const HepPoint3D &v)
 Set an initial vertex point for the mass-vertex constraint fit.
 
enum KFitError::ECode setInitialVertex (const ROOT::Math::XYZVector &v)
 Set an initial vertex point for the mass-vertex constraint fit.
 
enum KFitError::ECode setInvariantMass (const double m)
 Set an invariant mass for the mass-vertex 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.
 
const HepPoint3D getVertex (const int flag=KFitConst::kAfterFit) const
 Get a vertex position.
 
const CLHEP::HepSymMatrix getVertexError (void) const
 Get a fitted vertex error matrix.
 
double getInvariantMass (void) const
 Get an invariant mass.
 
double getCHIsq (void) const override
 Get a chi-square of the fit.
 
const CLHEP::HepMatrix getTrackVertexError (const int id) 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-vertex-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.
 
virtual enum KFitError::ECode setCorrelation (const CLHEP::HepMatrix &c)
 Set a correlation matrix.
 
virtual enum KFitError::ECode setZeroCorrelation (void)
 Indicate no correlation between tracks.
 
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

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.
 

Static Protected Member Functions

static CLHEP::HepSymMatrix makeError1 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e)
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
static CLHEP::HepMatrix makeError1 (const CLHEP::HepLorentzVector &p1, const CLHEP::HepLorentzVector &p2, const CLHEP::HepMatrix &e)
 Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.
 
static CLHEP::HepMatrix makeError2 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e)
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
static CLHEP::HepSymMatrix makeError3 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e, const bool is_fix_mass)
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
static 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)
 Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.
 
static CLHEP::HepMatrix makeError4 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e)
 Rebuild an error matrix from a Lorentz vector and an error matrix.
 
static bool isNonZeroEnergy (const CLHEP::HepLorentzVector &p)
 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.
 
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.
 
double m_InvariantMass
 Invariant mass.
 
std::vector< int > m_IsFixMass
 Array of flags whether the track property is fixed at the mass.
 

Detailed Description

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

Definition at line 34 of file MassVertexFitKFit.h.

Constructor & Destructor Documentation

◆ MassVertexFitKFit()

MassVertexFitKFit ( void )

Construct an object with no argument.

Definition at line 25 of file MassVertexFitKFit.cc.

25 :
26 m_BeforeVertex(HepPoint3D(0., 0., 0.)),
27 m_AfterVertexError(HepSymMatrix(3, 0))
28{
29 m_FlagFitted = false;
30 m_NecessaryTrackCount = 2;
31 m_V_E = HepMatrix(3, 3, 0);
32 m_v = HepMatrix(3, 1, 0);
33 m_v_a = HepMatrix(3, 1, 0);
34 m_InvariantMass = -1.0;
35}
Belle2::analysis::KFitBase::m_NecessaryTrackCount
int m_NecessaryTrackCount
Number needed tracks to perform fit.
Definition KFitBase.h:303
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_FlagFitted
bool m_FlagFitted
Flag to indicate if the fit is performed and succeeded.
Definition KFitBase.h:245
Belle2::analysis::KFitBase::m_v
CLHEP::HepMatrix m_v
See J.Tanaka Ph.D (2001) p137 for definition.
Definition KFitBase.h:285
Belle2::analysis::MassVertexFitKFit::m_AfterVertexError
CLHEP::HepSymMatrix m_AfterVertexError
Vertex error matrix after the fit.
Definition MassVertexFitKFit.h:121
Belle2::analysis::MassVertexFitKFit::m_BeforeVertex
HepPoint3D m_BeforeVertex
Vertex position before the fit.
Definition MassVertexFitKFit.h:116

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:71
Belle2::analysis::KFitError::kBadMatrixSize
@ kBadMatrixSize
Wrong correlation matrix size.
Definition KFitError.h:48
Belle2::analysis::KFitConst::kNumber7
static const int kNumber7
Constant 7 to check matrix size (internal use)
Definition KFitConst.h:30

◆ 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 550 of file MassVertexFitKFit.cc.

550 {
551 m_NDF = 2 * m_TrackCount - 3 + 1;
552
553 return m_ErrorCode = KFitError::kNoError;
554}
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-vertex-constraint fit.

Returns
error code (zero if success)

Definition at line 190 of file MassVertexFitKFit.cc.

190 {
191 return KFitBase::doFit2();
192}
Belle2::analysis::KFitBase::doFit2
enum KFitError::ECode doFit2(void)
Perform a fit (used in VertexFitKFit::doFit() and MassVertexFitKFit::doFit()).
Definition KFitBase.cc:578

◆ 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_lam
CLHEP::HepMatrix m_lam
See J.Tanaka Ph.D (2001) p137 for definition.
Definition KFitBase.h:276
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_d
CLHEP::HepMatrix m_d
See J.Tanaka Ph.D (2001) p137 for definition.
Definition KFitBase.h:268
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_D
CLHEP::HepMatrix m_V_D
See J.Tanaka Ph.D (2001) p138 for definition.
Definition KFitBase.h:271
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:57
Belle2::analysis::KFitError::kBadInitialCHIsq
@ kBadInitialCHIsq
Bad initial chi-square (internal error)
Definition KFitError.h:52
Belle2::analysis::KFitError::kBadTrackSize
@ kBadTrackSize
Track count too small to perform fit.
Definition KFitError.h:46
Belle2::analysis::KFitConst::kInitialCHIsq
static constexpr double kInitialCHIsq
Initial chi-square value (internal use)
Definition KFitConst.h:46
Belle2::analysis::KFitConst::kMaxIterationCount
static const int kMaxIterationCount
Maximum iteration step (internal use)
Definition KFitConst.h:43

◆ 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_Cov_v_al_1
CLHEP::HepMatrix m_Cov_v_al_1
See J.Tanaka Ph.D (2001) p137 for definition.
Definition KFitBase.h:291

◆ 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 64 of file MassVertexFitKFit.cc.

64 {
65 m_IsFixMass.push_back(true);
66
67 return m_ErrorCode = KFitError::kNoError;
68}
Belle2::analysis::MassVertexFitKFit::m_IsFixMass
std::vector< int > m_IsFixMass
Array of flags whether the track property is fixed at the mass.
Definition MassVertexFitKFit.h:128

◆ 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 112 of file MassVertexFitKFit.cc.

113{
114 return m_CHIsq;
115}

◆ 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 163 of file MassVertexFitKFit.cc.

164{
165 if (flag == KFitConst::kAfterFit && !isFitted()) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
166 if (!isTrackIDInRange(id1)) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
167 if (!isTrackIDInRange(id2)) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
168
169 switch (flag) {
170 case KFitConst::kBeforeFit:
171 return KFitBase::getCorrelation(id1, id2, flag);
172
173 case KFitConst::kAfterFit:
174 return makeError3(
175 this->getTrackMomentum(id1),
176 this->getTrackMomentum(id2),
177 m_V_al_1.sub(KFitConst::kNumber7 * id1 + 1, KFitConst::kNumber7 * (id1 + 1), KFitConst::kNumber7 * id2 + 1,
178 KFitConst::kNumber7 * (id2 + 1)),
179 m_IsFixMass[id1],
180 m_IsFixMass[id2]);
181
182 default:
183 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
184 return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
185 }
186}
Belle2::analysis::KFitBase::makeError3
static CLHEP::HepSymMatrix makeError3(const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e, const bool is_fix_mass)
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:41
Belle2::analysis::KFitConst::kAfterFit
static const int kAfterFit
Input parameter to specify after-fit when setting/getting a track attribute.
Definition KFitConst.h:35
Belle2::analysis::KFitConst::kBeforeFit
static const int kBeforeFit
Input parameter to specify before-fit when setting/getting a track attribute.
Definition KFitConst.h:33

◆ 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}

◆ getInvariantMass()

double getInvariantMass ( void ) const

Get an invariant mass.

Returns
invariant mass

Definition at line 105 of file MassVertexFitKFit.cc.

106{
107 return m_InvariantMass;
108}

◆ 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 128 of file MassVertexFitKFit.cc.

129{
130 if (!isFitted()) return -1;
131 if (!isTrackIDInRange(id)) return -1;
132
133 if (m_IsFixMass[id]) {
134
135 HepMatrix da(m_Tracks[id].getFitParameter(KFitConst::kBeforeFit) - m_Tracks[id].getFitParameter(KFitConst::kAfterFit));
136 int err_inverse = 0;
137 const double chisq = (da.T() * (m_Tracks[id].getFitError(KFitConst::kBeforeFit).inverse(err_inverse)) * da)[0][0];
138
139 if (err_inverse) {
140 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kCannotGetMatrixInverse);
141 return -1;
142 }
143
144 return chisq;
145
146 } else {
147
148 HepMatrix da(m_Tracks[id].getMomPos(KFitConst::kBeforeFit) - m_Tracks[id].getMomPos(KFitConst::kAfterFit));
149 int err_inverse = 0;
150 const double chisq = (da.T() * (m_Tracks[id].getError(KFitConst::kBeforeFit).inverse(err_inverse)) * da)[0][0];
151
152 if (err_inverse) {
153 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kCannotGetMatrixInverse);
154 return -1;
155 }
156
157 return chisq;
158 }
159}

◆ 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

Get a vertex error matrix of the track.

Parameters
idtrack id
Returns
vertex error matrix

Definition at line 119 of file MassVertexFitKFit.cc.

120{
121 if (!isTrackIDInRange(id)) return HepMatrix(3, KFitConst::kNumber7, 0);
122
123 return m_AfterTrackVertexError[id];
124}
Belle2::analysis::MassVertexFitKFit::m_AfterTrackVertexError
std::vector< CLHEP::HepMatrix > m_AfterTrackVertexError
array of vertex error matrices after the fit.
Definition MassVertexFitKFit.h:123

◆ 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 79 of file MassVertexFitKFit.cc.

80{
81 if (flag == KFitConst::kAfterFit && !isFitted()) return HepPoint3D();
82
83 switch (flag) {
84 case KFitConst::kBeforeFit:
85 return m_BeforeVertex;
86
87 case KFitConst::kAfterFit:
88 return m_AfterVertex;
89
90 default:
91 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
92 return HepPoint3D();
93 }
94}
Belle2::analysis::MassVertexFitKFit::m_AfterVertex
HepPoint3D m_AfterVertex
Vertex position after the fit.
Definition MassVertexFitKFit.h:119

◆ getVertexError()

const HepSymMatrix getVertexError ( void ) const

Get a fitted vertex error matrix.

Returns
vertex error matrix

Definition at line 98 of file MassVertexFitKFit.cc.

99{
100 return m_AfterVertexError;
101}

◆ 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:38

◆ isNonZeroEnergy()

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

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:55

◆ 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 378 of file MassVertexFitKFit.cc.

378 {
379 // Mass Constraint
380 HepMatrix al_1_prime(m_al_1);
381 HepMatrix Sum_al_1(4, 1, 0);
382 std::vector<double> energy(m_TrackCount);
383 double a;
384
385 for (int i = 0; i < m_TrackCount; i++)
386 {
387 a = m_property[i][2];
388 al_1_prime[i * KFitConst::kNumber7 + 0][0] -= a * (m_v_a[1][0] - al_1_prime[i * KFitConst::kNumber7 + 5][0]);
389 al_1_prime[i * KFitConst::kNumber7 + 1][0] += a * (m_v_a[0][0] - al_1_prime[i * KFitConst::kNumber7 + 4][0]);
390 energy[i] = sqrt(al_1_prime[i * KFitConst::kNumber7 + 0][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] +
391 al_1_prime[i * KFitConst::kNumber7 + 1][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] +
392 al_1_prime[i * KFitConst::kNumber7 + 2][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] +
393 m_property[i][1] * m_property[i][1]);
394 if (m_IsFixMass[i])
395 Sum_al_1[3][0] += energy[i];
396 else
397 Sum_al_1[3][0] += al_1_prime[i * KFitConst::kNumber7 + 3][0];
398 }
399
400 for (int i = 0; i < m_TrackCount; i++)
401 {
402 for (int j = 0; j < 3; j++) Sum_al_1[j][0] += al_1_prime[i * KFitConst::kNumber7 + j][0];
403 }
404
405 m_d[2 * m_TrackCount][0] =
406 + Sum_al_1[3][0] * Sum_al_1[3][0] - Sum_al_1[0][0] * Sum_al_1[0][0]
407 - Sum_al_1[1][0] * Sum_al_1[1][0] - Sum_al_1[2][0] * Sum_al_1[2][0]
408 - m_InvariantMass * m_InvariantMass;
409
410 double Sum_a = 0., Sum_tmpx = 0., Sum_tmpy = 0.;
411 for (int i = 0; i < m_TrackCount; i++)
412 {
413 if (energy[i] == 0) {
414 m_ErrorCode = KFitError::kDivisionByZero;
415 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
416 return m_ErrorCode;
417 }
418
419 a = m_property[i][2];
420
421 if (m_IsFixMass[i]) {
422 double invE = 1. / energy[i];
423 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 0] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE -
424 Sum_al_1[0][0]);
425 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 1] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE -
426 Sum_al_1[1][0]);
427 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 2] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] * invE -
428 Sum_al_1[2][0]);
429 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 3] = 0.;
430 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 4] = -2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE -
431 Sum_al_1[1][0]) * a;
432 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 5] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE -
433 Sum_al_1[0][0]) * a;
434 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 6] = 0.;
435 Sum_tmpx += al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE * a;
436 Sum_tmpy += al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE * a;
437 } else {
438 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 0] = -2.*Sum_al_1[0][0];
439 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 1] = -2.*Sum_al_1[1][0];
440 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 2] = -2.*Sum_al_1[2][0];
441 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 3] = 2.*Sum_al_1[3][0];
442 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 4] = 2.*Sum_al_1[1][0] * a;
443 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 5] = -2.*Sum_al_1[0][0] * a;
444 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 6] = 0.;
445 }
446 Sum_a += a;
447 }
448
449 // m_E
450 m_E[2 * m_TrackCount][0] = -2.*Sum_al_1[1][0] * Sum_a + 2.*Sum_al_1[3][0] * Sum_tmpy;
451 m_E[2 * m_TrackCount][1] = 2.*Sum_al_1[0][0] * Sum_a - 2.*Sum_al_1[3][0] * Sum_tmpx;
452 m_E[2 * m_TrackCount][2] = 0.;
453
454 for (int i = 0; i < m_TrackCount; i++)
455 {
456 double S, U;
457 double sininv;
458
459 double px = m_al_1[i * KFitConst::kNumber7 + 0][0];
460 double py = m_al_1[i * KFitConst::kNumber7 + 1][0];
461 double pz = m_al_1[i * KFitConst::kNumber7 + 2][0];
462 double x = m_al_1[i * KFitConst::kNumber7 + 4][0];
463 double y = m_al_1[i * KFitConst::kNumber7 + 5][0];
464 double z = m_al_1[i * KFitConst::kNumber7 + 6][0];
465 a = m_property[i][2];
466
467 double pt = sqrt(px * px + py * py);
468
469 if (pt == 0) {
470 m_ErrorCode = KFitError::kDivisionByZero;
471 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
472 return m_ErrorCode;
473 }
474
475 double invPt = 1. / pt;
476 double invPt2 = invPt * invPt;
477 double dlx = m_v_a[0][0] - x;
478 double dly = m_v_a[1][0] - y;
479 double dlz = m_v_a[2][0] - z;
480 double a1 = -dlx * py + dly * px;
481 double a2 = dlx * px + dly * py;
482 double r2d2 = dlx * dlx + dly * dly;
483 double Rx = dlx - 2.*px * a2 * invPt2;
484 double Ry = dly - 2.*py * a2 * invPt2;
485
486 if (a != 0.) { // charged
487
488 double B = a * a2 * invPt2;
489 if (fabs(B) > 1.) {
490 m_ErrorCode = KFitError::kDivisionByZero;
491 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
492 return m_ErrorCode;
493 }
494 // sin^(-1)(B)
495 sininv = asin(B);
496 double tmp0 = 1.0 - B * B;
497 if (tmp0 == 0) {
498 m_ErrorCode = KFitError::kDivisionByZero;
499 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
500 return m_ErrorCode;
501 }
502 // 1/sqrt(1-B^2)
503 double sqrtag = 1.0 / sqrt(tmp0);
504 S = sqrtag * invPt2;
505 U = dlz - pz * sininv / a;
506
507 } else { // neutral
508
509 sininv = 0.0;
510 S = invPt2;
511 U = dlz - pz * a2 * invPt2;
512
513 }
514
515 // d
516 m_d[i * 2 + 0][0] = a1 - 0.5 * a * r2d2;
517 m_d[i * 2 + 1][0] = U * pt;
518
519 // D
520 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 0] = dly;
521 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 1] = -dlx;
522 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 2] = 0.0;
523 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 4] = py + a * dlx;
524 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 5] = -px + a * dly;
525 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 6] = 0.0;
526 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 0] = -pz * pt * S * Rx + U * px * invPt;
527 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 1] = -pz * pt * S * Ry + U * py * invPt;
528 if (a != 0.)
529 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 2] = -sininv * pt / a;
530 else
531 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 2] = -a2 * invPt;
532 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 4] = px * pz * pt * S;
533 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 5] = py * pz * pt * S;
534 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 6] = -pt;
535
536 // E
537 m_E[i * 2 + 0][0] = -py - a * dlx;
538 m_E[i * 2 + 0][1] = px - a * dly;
539 m_E[i * 2 + 0][2] = 0.0;
540 m_E[i * 2 + 1][0] = -px * pz * pt * S;
541 m_E[i * 2 + 1][1] = -py * pz * pt * S;
542 m_E[i * 2 + 1][2] = pt;
543 }
544
545 return m_ErrorCode = KFitError::kNoError;
546}
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]

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

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
static bool isNonZeroEnergy(const CLHEP::HepLorentzVector &p)
Check if the energy is non-zero.
Definition KFitBase.cc:750

◆ makeError1() [2/2]

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

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()

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

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]

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

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]

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

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()

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

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 285 of file MassVertexFitKFit.cc.

285 {
286 if (m_BeforeCorrelation.size() != static_cast<unsigned int>(m_TrackCount * (m_TrackCount - 1) / 2))
287 {
288 m_ErrorCode = KFitError::kBadCorrelationSize;
289 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
290 return m_ErrorCode;
291 }
292
293 int row = 0, col = 0;
294
295 for (const auto& hm : m_BeforeCorrelation)
296 {
297 // counter
298 row++;
299 if (row == m_TrackCount) {
300 col++;
301 row = col + 1;
302 }
303
304 int ii = 0, jj = 0;
305 for (int i = KFitConst::kNumber7 * row; i < KFitConst::kNumber7 * (row + 1); i++) {
306 for (int j = KFitConst::kNumber7 * col; j < KFitConst::kNumber7 * (col + 1); j++) {
307 m_V_al_0[i][j] = hm[ii][jj];
308 jj++;
309 }
310 jj = 0;
311 ii++;
312 }
313 }
314
315 return m_ErrorCode = KFitError::kNoError;
316}
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:50

◆ 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 196 of file MassVertexFitKFit.cc.

196 {
197 if (m_TrackCount > KFitConst::kMaxTrackCount)
198 {
199 m_ErrorCode = KFitError::kBadTrackSize;
200 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
201 return m_ErrorCode;
202 }
203
204
205 if (m_IsFixMass.size() == 0)
206 {
207 // If no fix_mass flag at all,
208 // all tracks are considered to be fixed at mass.
209 for (int i = 0; i < m_TrackCount; i++) this->fixMass();
210 } else if (m_IsFixMass.size() != (unsigned int)m_TrackCount)
211 {
212 m_ErrorCode = KFitError::kBadTrackSize;
213 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
214 return m_ErrorCode;
215 }
216
217
218 int index = 0;
219 m_al_0 = HepMatrix(KFitConst::kNumber7 * m_TrackCount, 1, 0);
220 m_property = HepMatrix(m_TrackCount, 3, 0);
221 m_V_al_0 = HepSymMatrix(KFitConst::kNumber7 * m_TrackCount, 0);
222
223 for (const auto& track : m_Tracks)
224 {
225 // momentum x,y,z and position x,y,z
226 m_al_0[index * KFitConst::kNumber7 + 0][0] = track.getMomentum(KFitConst::kBeforeFit).x();
227 m_al_0[index * KFitConst::kNumber7 + 1][0] = track.getMomentum(KFitConst::kBeforeFit).y();
228 m_al_0[index * KFitConst::kNumber7 + 2][0] = track.getMomentum(KFitConst::kBeforeFit).z();
229 m_al_0[index * KFitConst::kNumber7 + 3][0] = track.getMomentum(KFitConst::kBeforeFit).t();
230 m_al_0[index * KFitConst::kNumber7 + 4][0] = track.getPosition(KFitConst::kBeforeFit).x();
231 m_al_0[index * KFitConst::kNumber7 + 5][0] = track.getPosition(KFitConst::kBeforeFit).y();
232 m_al_0[index * KFitConst::kNumber7 + 6][0] = track.getPosition(KFitConst::kBeforeFit).z();
233 // these error
234 m_V_al_0.sub(index * KFitConst::kNumber7 + 1, track.getError(KFitConst::kBeforeFit));
235 // charge, mass, a
236 m_property[index][0] = track.getCharge();
237 m_property[index][1] = track.getMass();
238 const double c = Const::speedOfLight * 1e-4;
239 m_property[index][2] = -c * m_MagneticField * track.getCharge();
240 index++;
241 }
242
243 // error between track and track
244 if (m_FlagCorrelation)
245 {
246 this->prepareCorrelation();
247 if (m_ErrorCode != KFitError::kNoError) {
248 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
249 return m_ErrorCode;
250 }
251 }
252
253 // vertex
254 m_v_a[0][0] = m_BeforeVertex.x();
255 m_v_a[1][0] = m_BeforeVertex.y();
256 m_v_a[2][0] = m_BeforeVertex.z();
257
258 // set member matrix
259 m_al_1 = m_al_0;
260
261 m_V_al_1 = HepMatrix(KFitConst::kNumber7 * m_TrackCount, KFitConst::kNumber7 * m_TrackCount, 0);
262 m_D = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, KFitConst::kNumber7 * m_TrackCount);
263 m_E = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 3);
264 m_d = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 1);
265 m_V_D = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, m_TrackCount * 2 + 1);
266 m_lam = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 1);
267 m_lam0 = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 1);
268 m_V_Dt = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, m_TrackCount * 2 + 1);
269 m_Cov_v_al_1 = m_V_al_1.sub(1, 3, 1, KFitConst::kNumber7 * m_TrackCount);
270
271 return m_ErrorCode = KFitError::kNoError;
272}
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::MassVertexFitKFit::prepareCorrelation
enum KFitError::ECode prepareCorrelation(void) override
Build a grand correlation matrix from input-track properties.
Definition MassVertexFitKFit.cc:285
Belle2::analysis::MassVertexFitKFit::fixMass
enum KFitError::ECode fixMass(void)
Tell the object to fix the last added track property at the invariant mass.
Definition MassVertexFitKFit.cc:64
Belle2::analysis::KFitConst::kMaxTrackCount
static const int kMaxTrackCount
Maximum track size.
Definition KFitConst.h:38

◆ 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 276 of file MassVertexFitKFit.cc.

276 {
277 // vertex
278 for (int i = 0; i < 3; i++) m_v[i][0] = m_v_a[i][0];
279
280 return m_ErrorCode = KFitError::kNoError;
281}

◆ prepareOutputMatrix()

enum KFitError::ECode prepareOutputMatrix ( void )
overrideprivatevirtual

Build an output error matrix.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 320 of file MassVertexFitKFit.cc.

320 {
321 Hep3Vector h3v;
322 int index = 0;
323 for (auto& pdata : m_Tracks)
324 {
325 // tracks
326 // momentum
327 h3v.setX(m_al_1[index * KFitConst::kNumber7 + 0][0]);
328 h3v.setY(m_al_1[index * KFitConst::kNumber7 + 1][0]);
329 h3v.setZ(m_al_1[index * KFitConst::kNumber7 + 2][0]);
330 if (m_IsFixMass[index])
331 pdata.setMomentum(HepLorentzVector(h3v, sqrt(h3v.mag2() + pdata.getMass()*pdata.getMass())), KFitConst::kAfterFit);
332 else
333 pdata.setMomentum(HepLorentzVector(h3v, m_al_1[index * KFitConst::kNumber7 + 3][0]), KFitConst::kAfterFit);
334 // position
335 pdata.setPosition(HepPoint3D(
336 m_al_1[index * KFitConst::kNumber7 + 4][0],
337 m_al_1[index * KFitConst::kNumber7 + 5][0],
338 m_al_1[index * KFitConst::kNumber7 + 6][0]), KFitConst::kAfterFit);
339 // error of the tracks
340 pdata.setError(this->makeError3(pdata.getMomentum(),
341 m_V_al_1.sub(
342 index * KFitConst::kNumber7 + 1,
343 (index + 1)*KFitConst::kNumber7,
344 index * KFitConst::kNumber7 + 1,
345 (index + 1)*KFitConst::kNumber7), m_IsFixMass[index]),
346 KFitConst::kAfterFit);
347 if (m_ErrorCode != KFitError::kNoError) break;
348 index++;
349 }
350
351 // vertex
352 m_AfterVertex.setX(m_v_a[0][0]);
353 m_AfterVertex.setY(m_v_a[1][0]);
354 m_AfterVertex.setZ(m_v_a[2][0]);
355 // error of the vertex
356 for (int i = 0; i < 3; i++) for (int j = i; j < 3; j++)
357 {
358 m_AfterVertexError[i][j] = m_V_E[i][j];
359 }
360 // error between vertex and tracks
361 for (int i = 0; i < m_TrackCount; i++)
362 {
363 HepMatrix hm(3, KFitConst::kNumber7, 0);
364 for (int j = 0; j < 3; j++) for (int k = 0; k < KFitConst::kNumber7; k++) {
365 hm[j][k] = m_Cov_v_al_1[j][KFitConst::kNumber7 * i + k];
366 }
367 if (m_IsFixMass[i])
368 m_AfterTrackVertexError.push_back(this->makeError4(m_Tracks[i].getMomentum(), hm));
369 else
370 m_AfterTrackVertexError.push_back(hm);
371 }
372
373 return m_ErrorCode = KFitError::kNoError;
374}
Belle2::analysis::KFitBase::makeError4
static CLHEP::HepMatrix makeError4(const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e)
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)
virtualinherited

Set a correlation matrix.

Not intended for end user's use.

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

Definition at line 70 of file KFitBase.cc.

70 {
71 if (e.num_row() != KFitConst::kNumber7)
72 {
73 m_ErrorCode = KFitError::kBadMatrixSize;
74 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
75 return m_ErrorCode;
76 }
77 m_BeforeCorrelation.push_back(e);
78 m_FlagCorrelation = true;
79
80 return m_ErrorCode = KFitError::kNoError;
81}

◆ setInitialVertex() [1/2]

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

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

Parameters
vinitial vertex point
Returns
error code (zero if success)

Definition at line 42 of file MassVertexFitKFit.cc.

42 {
43 m_BeforeVertex = v;
44
45 return m_ErrorCode = KFitError::kNoError;
46}

◆ setInitialVertex() [2/2]

enum KFitError::ECode setInitialVertex ( const ROOT::Math::XYZVector & v)

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

Parameters
vinitial vertex point
Returns
error code (zero if success)

Definition at line 48 of file MassVertexFitKFit.cc.

49{
50 m_BeforeVertex = ROOTToCLHEP::getPoint3D(v);
51 m_ErrorCode = KFitError::kNoError;
52 return m_ErrorCode;
53}

◆ setInvariantMass()

enum KFitError::ECode setInvariantMass ( const double m)

Set an invariant mass for the mass-vertex constraint fit.

Parameters
minvariant mass
Returns
error code (zero if success)

Definition at line 56 of file MassVertexFitKFit.cc.

56 {
57 m_InvariantMass = m;
58
59 return m_ErrorCode = KFitError::kNoError;
60}

◆ 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}

◆ setZeroCorrelation()

enum KFitError::ECode setZeroCorrelation ( void )
virtualinherited

Indicate no correlation between tracks.

Not intended for end user's use.

Returns
error code (zero if success)

Definition at line 85 of file KFitBase.cc.

85 {
86 HepMatrix zero(KFitConst::kNumber7, KFitConst::kNumber7, 0);
87
88 return this->setCorrelation(zero);
89}
Belle2::analysis::KFitBase::setCorrelation
virtual enum KFitError::ECode setCorrelation(const CLHEP::HepMatrix &c)
Set a correlation matrix.
Definition KFitBase.cc:70

◆ 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 72 of file MassVertexFitKFit.cc.

72 {
73 m_IsFixMass.push_back(false);
74
75 return m_ErrorCode = KFitError::kNoError;
76}

◆ updateMother()

enum KFitError::ECode updateMother ( Particle * mother)

Update mother particle.

Parameters
[in]motherMother particle.

Definition at line 556 of file MassVertexFitKFit.cc.

557{
558 MakeMotherKFit kmm;
559 kmm.setMagneticField(m_MagneticField);
560 unsigned n = getTrackCount();
561 for (unsigned i = 0; i < n; ++i) {
562 kmm.addTrack(getTrackMomentum(i), getTrackPosition(i), getTrackError(i),
563 getTrack(i).getCharge());
564 kmm.setTrackVertexError(getTrackVertexError(i));
565 for (unsigned j = i + 1; j < n; ++j) {
566 kmm.setCorrelation(getCorrelation(i, j));
567 }
568 }
569 kmm.setVertex(getVertex());
570 kmm.setVertexError(getVertexError());
571 m_ErrorCode = kmm.doMake();
572 if (m_ErrorCode != KFitError::kNoError)
573 return m_ErrorCode;
574 double chi2 = getCHIsq();
575 int ndf = getNDF();
576 double prob = TMath::Prob(chi2, ndf);
577 //
578 bool haschi2 = mother->hasExtraInfo("chiSquared");
579 if (haschi2) {
580 mother->setExtraInfo("chiSquared", chi2);
581 mother->setExtraInfo("ndf", ndf);
582 } else {
583 mother->addExtraInfo("chiSquared", chi2);
584 mother->addExtraInfo("ndf", ndf);
585 }
586
587 mother->updateMomentum(
588 CLHEPToROOT::getLorentzVector(kmm.getMotherMomentum()),
589 CLHEPToROOT::getXYZVector(kmm.getMotherPosition()),
590 CLHEPToROOT::getTMatrixFSym(kmm.getMotherError()),
591 prob);
592 m_ErrorCode = KFitError::kNoError;
593 return m_ErrorCode;
594}
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:1402
Belle2::Particle::hasExtraInfo
bool hasExtraInfo(const std::string &name) const
Return whether the extra info with the given name is set.
Definition Particle.cc:1351
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:1421
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:397
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::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::MassVertexFitKFit::getCHIsq
double getCHIsq(void) const override
Get a chi-square of the fit.
Definition MassVertexFitKFit.cc:112
Belle2::analysis::MassVertexFitKFit::getVertexError
const CLHEP::HepSymMatrix getVertexError(void) const
Get a fitted vertex error matrix.
Definition MassVertexFitKFit.cc:98
Belle2::analysis::MassVertexFitKFit::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 MassVertexFitKFit.cc:163
Belle2::analysis::MassVertexFitKFit::getVertex
const HepPoint3D getVertex(const int flag=KFitConst::kAfterFit) const
Get a vertex position.
Definition MassVertexFitKFit.cc:79
Belle2::analysis::MassVertexFitKFit::getTrackVertexError
const CLHEP::HepMatrix getTrackVertexError(const int id) const
Get a vertex error matrix of the track.
Definition MassVertexFitKFit.cc:119

Member Data Documentation

◆ m_AfterTrackVertexError

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

array of vertex error matrices after the fit.

Definition at line 123 of file MassVertexFitKFit.h.

◆ m_AfterVertex

HepPoint3D m_AfterVertex
private

Vertex position after the fit.

Definition at line 119 of file MassVertexFitKFit.h.

◆ m_AfterVertexError

CLHEP::HepSymMatrix m_AfterVertexError
private

Vertex error matrix after the fit.

Definition at line 121 of file MassVertexFitKFit.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_BeforeVertex

HepPoint3D m_BeforeVertex
private

Vertex position before the fit.

Definition at line 116 of file MassVertexFitKFit.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_FlagCorrelation

bool m_FlagCorrelation
protectedinherited

Flag whether a correlation among tracks exists.

Definition at line 306 of file KFitBase.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_InvariantMass

double m_InvariantMass
private

Invariant mass.

Definition at line 126 of file MassVertexFitKFit.h.

◆ m_IsFixMass

std::vector<int> m_IsFixMass
private

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

Definition at line 128 of file MassVertexFitKFit.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: