Belle II Software light-2406-ragdoll
Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions | Private Attributes | List of all members
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:
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Public Member Functions

 MassVertexFitKFit (void)
 Construct an object with no argument.
 
 ~MassVertexFitKFit (void)
 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 B2Vector3D &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.
 
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 (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.
 
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.
 
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 22 of file MassVertexFitKFit.cc.

22 :
23 m_BeforeVertex(HepPoint3D(0., 0., 0.)),
24 m_AfterVertexError(HepSymMatrix(3, 0))
25{
26 m_FlagFitted = false;
27 m_NecessaryTrackCount = 2;
28 m_V_E = HepMatrix(3, 3, 0);
29 m_v = HepMatrix(3, 1, 0);
30 m_v_a = HepMatrix(3, 1, 0);
31 m_InvariantMass = -1.0;
32}
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:124
Belle2::analysis::MassVertexFitKFit::m_BeforeVertex
HepPoint3D m_BeforeVertex
Vertex position before the fit.
Definition: MassVertexFitKFit.h:119

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::Particle::getVertex
ROOT::Math::XYZVector getVertex() const
Returns vertex position (POCA for charged, IP for neutral FS particles)
Definition: Particle.h:631
Belle2::Particle::getCharge
double getCharge(void) const
Returns particle charge.
Definition: Particle.cc:622
Belle2::Particle::get4Vector
ROOT::Math::PxPyPzEVector get4Vector() const
Returns Lorentz vector.
Definition: Particle.h:547
Belle2::Particle::getMomentumVertexErrorMatrix
TMatrixFSym getMomentumVertexErrorMatrix() const
Returns 7x7 error matrix.
Definition: Particle.cc:420
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 560 of file MassVertexFitKFit.cc.

560 {
561 m_NDF = 2 * m_TrackCount - 3 + 1;
562
563 return m_ErrorCode = KFitError::kNoError;
564}
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 200 of file MassVertexFitKFit.cc.

200 {
201 return KFitBase::doFit2();
202}
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: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_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 61 of file MassVertexFitKFit.cc.

61 {
62 m_IsFixMass.push_back(true);
63
64 return m_ErrorCode = KFitError::kNoError;
65}
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:131

◆ 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 122 of file MassVertexFitKFit.cc.

123{
124 return m_CHIsq;
125}

◆ 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 173 of file MassVertexFitKFit.cc.

174{
175 if (flag == KFitConst::kAfterFit && !isFitted()) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
176 if (!isTrackIDInRange(id1)) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
177 if (!isTrackIDInRange(id2)) return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
178
179 switch (flag) {
180 case KFitConst::kBeforeFit:
181 return KFitBase::getCorrelation(id1, id2, flag);
182
183 case KFitConst::kAfterFit:
184 return makeError3(
185 this->getTrackMomentum(id1),
186 this->getTrackMomentum(id2),
187 m_V_al_1.sub(KFitConst::kNumber7 * id1 + 1, KFitConst::kNumber7 * (id1 + 1), KFitConst::kNumber7 * id2 + 1,
188 KFitConst::kNumber7 * (id2 + 1)),
189 m_IsFixMass[id1],
190 m_IsFixMass[id2]);
191
192 default:
193 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
194 return HepMatrix(KFitConst::kNumber7, KFitConst::kNumber7, 0);
195 }
196}
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}

◆ getInvariantMass()

double getInvariantMass ( void  ) const

Get an invariant mass.

Returns
invariant mass

Definition at line 115 of file MassVertexFitKFit.cc.

116{
117 return m_InvariantMass;
118}

◆ 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 138 of file MassVertexFitKFit.cc.

139{
140 if (!isFitted()) return -1;
141 if (!isTrackIDInRange(id)) return -1;
142
143 if (m_IsFixMass[id]) {
144
145 HepMatrix da(m_Tracks[id].getFitParameter(KFitConst::kBeforeFit) - m_Tracks[id].getFitParameter(KFitConst::kAfterFit));
146 int err_inverse = 0;
147 const double chisq = (da.T() * (m_Tracks[id].getFitError(KFitConst::kBeforeFit).inverse(err_inverse)) * da)[0][0];
148
149 if (err_inverse) {
150 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kCannotGetMatrixInverse);
151 return -1;
152 }
153
154 return chisq;
155
156 } else {
157
158 HepMatrix da(m_Tracks[id].getMomPos(KFitConst::kBeforeFit) - m_Tracks[id].getMomPos(KFitConst::kAfterFit));
159 int err_inverse = 0;
160 const double chisq = (da.T() * (m_Tracks[id].getError(KFitConst::kBeforeFit).inverse(err_inverse)) * da)[0][0];
161
162 if (err_inverse) {
163 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kCannotGetMatrixInverse);
164 return -1;
165 }
166
167 return chisq;
168 }
169}

◆ 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 129 of file MassVertexFitKFit.cc.

130{
131 if (!isTrackIDInRange(id)) return HepMatrix(3, KFitConst::kNumber7, 0);
132
133 return m_AfterTrackVertexError[id];
134}
Belle2::analysis::MassVertexFitKFit::m_AfterTrackVertexError
std::vector< CLHEP::HepMatrix > m_AfterTrackVertexError
array of vertex error matrices after the fit.
Definition: MassVertexFitKFit.h:126

◆ 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 89 of file MassVertexFitKFit.cc.

90{
91 if (flag == KFitConst::kAfterFit && !isFitted()) return HepPoint3D();
92
93 switch (flag) {
94 case KFitConst::kBeforeFit:
95 return m_BeforeVertex;
96
97 case KFitConst::kAfterFit:
98 return m_AfterVertex;
99
100 default:
101 KFitError::displayError(__FILE__, __LINE__, __func__, KFitError::kOutOfRange);
102 return HepPoint3D();
103 }
104}
Belle2::analysis::MassVertexFitKFit::m_AfterVertex
HepPoint3D m_AfterVertex
Vertex position after the fit.
Definition: MassVertexFitKFit.h:122

◆ getVertexError()

const HepSymMatrix getVertexError ( void  ) const

Get a fitted vertex error matrix.

Returns
vertex error matrix

Definition at line 108 of file MassVertexFitKFit.cc.

109{
110 return m_AfterVertexError;
111}

◆ 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 388 of file MassVertexFitKFit.cc.

388 {
389 // Mass Constraint
390 HepMatrix al_1_prime(m_al_1);
391 HepMatrix Sum_al_1(4, 1, 0);
392 std::vector<double> energy(m_TrackCount);
393 double a;
394
395 for (int i = 0; i < m_TrackCount; i++)
396 {
397 a = m_property[i][2];
398 al_1_prime[i * KFitConst::kNumber7 + 0][0] -= a * (m_v_a[1][0] - al_1_prime[i * KFitConst::kNumber7 + 5][0]);
399 al_1_prime[i * KFitConst::kNumber7 + 1][0] += a * (m_v_a[0][0] - al_1_prime[i * KFitConst::kNumber7 + 4][0]);
400 energy[i] = sqrt(al_1_prime[i * KFitConst::kNumber7 + 0][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] +
401 al_1_prime[i * KFitConst::kNumber7 + 1][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] +
402 al_1_prime[i * KFitConst::kNumber7 + 2][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] +
403 m_property[i][1] * m_property[i][1]);
404 if (m_IsFixMass[i])
405 Sum_al_1[3][0] += energy[i];
406 else
407 Sum_al_1[3][0] += al_1_prime[i * KFitConst::kNumber7 + 3][0];
408 }
409
410 for (int i = 0; i < m_TrackCount; i++)
411 {
412 for (int j = 0; j < 3; j++) Sum_al_1[j][0] += al_1_prime[i * KFitConst::kNumber7 + j][0];
413 }
414
415 m_d[2 * m_TrackCount][0] =
416 + Sum_al_1[3][0] * Sum_al_1[3][0] - Sum_al_1[0][0] * Sum_al_1[0][0]
417 - Sum_al_1[1][0] * Sum_al_1[1][0] - Sum_al_1[2][0] * Sum_al_1[2][0]
418 - m_InvariantMass * m_InvariantMass;
419
420 double Sum_a = 0., Sum_tmpx = 0., Sum_tmpy = 0.;
421 for (int i = 0; i < m_TrackCount; i++)
422 {
423 if (energy[i] == 0) {
424 m_ErrorCode = KFitError::kDivisionByZero;
425 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
426 return m_ErrorCode;
427 }
428
429 a = m_property[i][2];
430
431 if (m_IsFixMass[i]) {
432 double invE = 1. / energy[i];
433 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 0] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE -
434 Sum_al_1[0][0]);
435 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 1] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE -
436 Sum_al_1[1][0]);
437 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 2] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 2][0] * invE -
438 Sum_al_1[2][0]);
439 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 3] = 0.;
440 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 4] = -2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE -
441 Sum_al_1[1][0]) * a;
442 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 5] = 2.*(Sum_al_1[3][0] * al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE -
443 Sum_al_1[0][0]) * a;
444 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 6] = 0.;
445 Sum_tmpx += al_1_prime[i * KFitConst::kNumber7 + 0][0] * invE * a;
446 Sum_tmpy += al_1_prime[i * KFitConst::kNumber7 + 1][0] * invE * a;
447 } else {
448 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 0] = -2.*Sum_al_1[0][0];
449 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 1] = -2.*Sum_al_1[1][0];
450 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 2] = -2.*Sum_al_1[2][0];
451 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 3] = 2.*Sum_al_1[3][0];
452 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 4] = 2.*Sum_al_1[1][0] * a;
453 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 5] = -2.*Sum_al_1[0][0] * a;
454 m_D[2 * m_TrackCount][i * KFitConst::kNumber7 + 6] = 0.;
455 }
456 Sum_a += a;
457 }
458
459 // m_E
460 m_E[2 * m_TrackCount][0] = -2.*Sum_al_1[1][0] * Sum_a + 2.*Sum_al_1[3][0] * Sum_tmpy;
461 m_E[2 * m_TrackCount][1] = 2.*Sum_al_1[0][0] * Sum_a - 2.*Sum_al_1[3][0] * Sum_tmpx;
462 m_E[2 * m_TrackCount][2] = 0.;
463
464 for (int i = 0; i < m_TrackCount; i++)
465 {
466 double S, U;
467 double sininv;
468
469 double px = m_al_1[i * KFitConst::kNumber7 + 0][0];
470 double py = m_al_1[i * KFitConst::kNumber7 + 1][0];
471 double pz = m_al_1[i * KFitConst::kNumber7 + 2][0];
472 double x = m_al_1[i * KFitConst::kNumber7 + 4][0];
473 double y = m_al_1[i * KFitConst::kNumber7 + 5][0];
474 double z = m_al_1[i * KFitConst::kNumber7 + 6][0];
475 a = m_property[i][2];
476
477 double pt = sqrt(px * px + py * py);
478
479 if (pt == 0) {
480 m_ErrorCode = KFitError::kDivisionByZero;
481 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
482 return m_ErrorCode;
483 }
484
485 double invPt = 1. / pt;
486 double invPt2 = invPt * invPt;
487 double dlx = m_v_a[0][0] - x;
488 double dly = m_v_a[1][0] - y;
489 double dlz = m_v_a[2][0] - z;
490 double a1 = -dlx * py + dly * px;
491 double a2 = dlx * px + dly * py;
492 double r2d2 = dlx * dlx + dly * dly;
493 double Rx = dlx - 2.*px * a2 * invPt2;
494 double Ry = dly - 2.*py * a2 * invPt2;
495
496 if (a != 0.) { // charged
497
498 double B = a * a2 * invPt2;
499 if (fabs(B) > 1.) {
500 m_ErrorCode = KFitError::kDivisionByZero;
501 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
502 return m_ErrorCode;
503 }
504 // sin^(-1)(B)
505 sininv = asin(B);
506 double tmp0 = 1.0 - B * B;
507 if (tmp0 == 0) {
508 m_ErrorCode = KFitError::kDivisionByZero;
509 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
510 return m_ErrorCode;
511 }
512 // 1/sqrt(1-B^2)
513 double sqrtag = 1.0 / sqrt(tmp0);
514 S = sqrtag * invPt2;
515 U = dlz - pz * sininv / a;
516
517 } else { // neutral
518
519 sininv = 0.0;
520 S = invPt2;
521 U = dlz - pz * a2 * invPt2;
522
523 }
524
525 // d
526 m_d[i * 2 + 0][0] = a1 - 0.5 * a * r2d2;
527 m_d[i * 2 + 1][0] = U * pt;
528
529 // D
530 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 0] = dly;
531 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 1] = -dlx;
532 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 2] = 0.0;
533 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 4] = py + a * dlx;
534 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 5] = -px + a * dly;
535 m_D[i * 2 + 0][i * KFitConst::kNumber7 + 6] = 0.0;
536 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 0] = -pz * pt * S * Rx + U * px * invPt;
537 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 1] = -pz * pt * S * Ry + U * py * invPt;
538 if (a != 0.)
539 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 2] = -sininv * pt / a;
540 else
541 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 2] = -a2 * invPt;
542 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 4] = px * pz * pt * S;
543 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 5] = py * pz * pt * S;
544 m_D[i * 2 + 1][i * KFitConst::kNumber7 + 6] = -pt;
545
546 // E
547 m_E[i * 2 + 0][0] = -py - a * dlx;
548 m_E[i * 2 + 0][1] = px - a * dly;
549 m_E[i * 2 + 0][2] = 0.0;
550 m_E[i * 2 + 1][0] = -px * pz * pt * S;
551 m_E[i * 2 + 1][1] = -py * pz * pt * S;
552 m_E[i * 2 + 1][2] = pt;
553 }
554
555 return m_ErrorCode = KFitError::kNoError;
556}
Belle2::analysis::KFitBase::m_property
CLHEP::HepMatrix m_property
Container of charges and masses.
Definition: KFitBase.h:263

◆ 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 295 of file MassVertexFitKFit.cc.

295 {
296 if (m_BeforeCorrelation.size() != static_cast<unsigned int>(m_TrackCount * (m_TrackCount - 1) / 2))
297 {
298 m_ErrorCode = KFitError::kBadCorrelationSize;
299 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
300 return m_ErrorCode;
301 }
302
303 int row = 0, col = 0;
304
305 for (auto& hm : m_BeforeCorrelation)
306 {
307 // counter
308 row++;
309 if (row == m_TrackCount) {
310 col++;
311 row = col + 1;
312 }
313
314 int ii = 0, jj = 0;
315 for (int i = KFitConst::kNumber7 * row; i < KFitConst::kNumber7 * (row + 1); i++) {
316 for (int j = KFitConst::kNumber7 * col; j < KFitConst::kNumber7 * (col + 1); j++) {
317 m_V_al_0[i][j] = hm[ii][jj];
318 jj++;
319 }
320 jj = 0;
321 ii++;
322 }
323 }
324
325 return m_ErrorCode = KFitError::kNoError;
326}
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 206 of file MassVertexFitKFit.cc.

206 {
207 if (m_TrackCount > KFitConst::kMaxTrackCount)
208 {
209 m_ErrorCode = KFitError::kBadTrackSize;
210 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
211 return m_ErrorCode;
212 }
213
214
215 if (m_IsFixMass.size() == 0)
216 {
217 // If no fix_mass flag at all,
218 // all tracks are considered to be fixed at mass.
219 for (int i = 0; i < m_TrackCount; i++) this->fixMass();
220 } else if (m_IsFixMass.size() != (unsigned int)m_TrackCount)
221 {
222 m_ErrorCode = KFitError::kBadTrackSize;
223 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
224 return m_ErrorCode;
225 }
226
227
228 int index = 0;
229 m_al_0 = HepMatrix(KFitConst::kNumber7 * m_TrackCount, 1, 0);
230 m_property = HepMatrix(m_TrackCount, 3, 0);
231 m_V_al_0 = HepSymMatrix(KFitConst::kNumber7 * m_TrackCount, 0);
232
233 for (auto& track : m_Tracks)
234 {
235 // momentum x,y,z and position x,y,z
236 m_al_0[index * KFitConst::kNumber7 + 0][0] = track.getMomentum(KFitConst::kBeforeFit).x();
237 m_al_0[index * KFitConst::kNumber7 + 1][0] = track.getMomentum(KFitConst::kBeforeFit).y();
238 m_al_0[index * KFitConst::kNumber7 + 2][0] = track.getMomentum(KFitConst::kBeforeFit).z();
239 m_al_0[index * KFitConst::kNumber7 + 3][0] = track.getMomentum(KFitConst::kBeforeFit).t();
240 m_al_0[index * KFitConst::kNumber7 + 4][0] = track.getPosition(KFitConst::kBeforeFit).x();
241 m_al_0[index * KFitConst::kNumber7 + 5][0] = track.getPosition(KFitConst::kBeforeFit).y();
242 m_al_0[index * KFitConst::kNumber7 + 6][0] = track.getPosition(KFitConst::kBeforeFit).z();
243 // these error
244 m_V_al_0.sub(index * KFitConst::kNumber7 + 1, track.getError(KFitConst::kBeforeFit));
245 // charge, mass, a
246 m_property[index][0] = track.getCharge();
247 m_property[index][1] = track.getMass();
248 const double c = Belle2::Const::speedOfLight * 1e-4;
249 m_property[index][2] = -c * m_MagneticField * track.getCharge();
250 index++;
251 }
252
253 // error between track and track
254 if (m_FlagCorrelation)
255 {
256 this->prepareCorrelation();
257 if (m_ErrorCode != KFitError::kNoError) {
258 KFitError::displayError(__FILE__, __LINE__, __func__, m_ErrorCode);
259 return m_ErrorCode;
260 }
261 }
262
263 // vertex
264 m_v_a[0][0] = m_BeforeVertex.x();
265 m_v_a[1][0] = m_BeforeVertex.y();
266 m_v_a[2][0] = m_BeforeVertex.z();
267
268 // set member matrix
269 m_al_1 = m_al_0;
270
271 m_V_al_1 = HepMatrix(KFitConst::kNumber7 * m_TrackCount, KFitConst::kNumber7 * m_TrackCount, 0);
272 m_D = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, KFitConst::kNumber7 * m_TrackCount);
273 m_E = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 3);
274 m_d = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 1);
275 m_V_D = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, m_TrackCount * 2 + 1);
276 m_lam = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 1);
277 m_lam0 = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, 1);
278 m_V_Dt = m_V_al_1.sub(1, m_TrackCount * 2 + 1, 1, m_TrackCount * 2 + 1);
279 m_Cov_v_al_1 = m_V_al_1.sub(1, 3, 1, KFitConst::kNumber7 * m_TrackCount);
280
281 return m_ErrorCode = KFitError::kNoError;
282}
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:295
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:61
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 286 of file MassVertexFitKFit.cc.

286 {
287 // vertex
288 for (int i = 0; i < 3; i++) m_v[i][0] = m_v_a[i][0];
289
290 return m_ErrorCode = KFitError::kNoError;
291}

◆ prepareOutputMatrix()

enum KFitError::ECode prepareOutputMatrix ( void  )
overrideprivatevirtual

Build an output error matrix.

Returns
error code (zero if success)

Implements KFitBase.

Definition at line 330 of file MassVertexFitKFit.cc.

330 {
331 Hep3Vector h3v;
332 int index = 0;
333 for (auto& pdata : m_Tracks)
334 {
335 // tracks
336 // momentum
337 h3v.setX(m_al_1[index * KFitConst::kNumber7 + 0][0]);
338 h3v.setY(m_al_1[index * KFitConst::kNumber7 + 1][0]);
339 h3v.setZ(m_al_1[index * KFitConst::kNumber7 + 2][0]);
340 if (m_IsFixMass[index])
341 pdata.setMomentum(HepLorentzVector(h3v, sqrt(h3v.mag2() + pdata.getMass()*pdata.getMass())), KFitConst::kAfterFit);
342 else
343 pdata.setMomentum(HepLorentzVector(h3v, m_al_1[index * KFitConst::kNumber7 + 3][0]), KFitConst::kAfterFit);
344 // position
345 pdata.setPosition(HepPoint3D(
346 m_al_1[index * KFitConst::kNumber7 + 4][0],
347 m_al_1[index * KFitConst::kNumber7 + 5][0],
348 m_al_1[index * KFitConst::kNumber7 + 6][0]), KFitConst::kAfterFit);
349 // error of the tracks
350 pdata.setError(this->makeError3(pdata.getMomentum(),
351 m_V_al_1.sub(
352 index * KFitConst::kNumber7 + 1,
353 (index + 1)*KFitConst::kNumber7,
354 index * KFitConst::kNumber7 + 1,
355 (index + 1)*KFitConst::kNumber7), m_IsFixMass[index]),
356 KFitConst::kAfterFit);
357 if (m_ErrorCode != KFitError::kNoError) break;
358 index++;
359 }
360
361 // vertex
362 m_AfterVertex.setX(m_v_a[0][0]);
363 m_AfterVertex.setY(m_v_a[1][0]);
364 m_AfterVertex.setZ(m_v_a[2][0]);
365 // error of the vertex
366 for (int i = 0; i < 3; i++) for (int j = i; j < 3; j++)
367 {
368 m_AfterVertexError[i][j] = m_V_E[i][j];
369 }
370 // error between vertex and tracks
371 for (int i = 0; i < m_TrackCount; i++)
372 {
373 HepMatrix hm(3, KFitConst::kNumber7, 0);
374 for (int j = 0; j < 3; j++) for (int k = 0; k < KFitConst::kNumber7; k++) {
375 hm[j][k] = m_Cov_v_al_1[j][KFitConst::kNumber7 * i + k];
376 }
377 if (m_IsFixMass[i])
378 m_AfterTrackVertexError.push_back(this->makeError4(m_Tracks[i].getMomentum(), hm));
379 else
380 m_AfterTrackVertexError.push_back(hm);
381 }
382
383 return m_ErrorCode = KFitError::kNoError;
384}
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 77 of file MassVertexFitKFit.cc.

77 {
78 return KFitBase::setCorrelation(m);
79}
Belle2::analysis::KFitBase::setCorrelation
virtual enum KFitError::ECode setCorrelation(const CLHEP::HepMatrix &c)
Set a correlation matrix.
Definition: KFitBase.cc:70

◆ setInitialVertex() [1/2]

enum KFitError::ECode setInitialVertex ( const B2Vector3D &  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 45 of file MassVertexFitKFit.cc.

46{
47 m_BeforeVertex = HepPoint3D(v.X(), v.Y(), v.Z());
48 m_ErrorCode = KFitError::kNoError;
49 return m_ErrorCode;
50}
Belle2::B2Vector3::Z
DataType Z() const
access variable Z (= .at(2) without boundary check)
Definition: B2Vector3.h:435
Belle2::B2Vector3::X
DataType X() const
access variable X (= .at(0) without boundary check)
Definition: B2Vector3.h:431
Belle2::B2Vector3::Y
DataType Y() const
access variable Y (= .at(1) without boundary check)
Definition: B2Vector3.h:433

◆ setInitialVertex() [2/2]

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 39 of file MassVertexFitKFit.cc.

39 {
40 m_BeforeVertex = v;
41
42 return m_ErrorCode = KFitError::kNoError;
43}

◆ 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 53 of file MassVertexFitKFit.cc.

53 {
54 m_InvariantMass = m;
55
56 return m_ErrorCode = KFitError::kNoError;
57}

◆ 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  )
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 83 of file MassVertexFitKFit.cc.

83 {
84 return KFitBase::setZeroCorrelation();
85}
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 69 of file MassVertexFitKFit.cc.

69 {
70 m_IsFixMass.push_back(false);
71
72 return m_ErrorCode = KFitError::kNoError;
73}

◆ updateMother()

enum KFitError::ECode updateMother ( Particle *  mother)

Update mother particle.

Parameters
[in]motherMother particle.

Definition at line 566 of file MassVertexFitKFit.cc.

567{
568 MakeMotherKFit kmm;
569 kmm.setMagneticField(m_MagneticField);
570 unsigned n = getTrackCount();
571 for (unsigned i = 0; i < n; ++i) {
572 kmm.addTrack(getTrackMomentum(i), getTrackPosition(i), getTrackError(i),
573 getTrack(i).getCharge());
574 kmm.setTrackVertexError(getTrackVertexError(i));
575 for (unsigned j = i + 1; j < n; ++j) {
576 kmm.setCorrelation(getCorrelation(i, j));
577 }
578 }
579 kmm.setVertex(getVertex());
580 kmm.setVertexError(getVertexError());
581 m_ErrorCode = kmm.doMake();
582 if (m_ErrorCode != KFitError::kNoError)
583 return m_ErrorCode;
584 double chi2 = getCHIsq();
585 int ndf = getNDF();
586 double prob = TMath::Prob(chi2, ndf);
587 //
588 bool haschi2 = mother->hasExtraInfo("chiSquared");
589 if (haschi2) {
590 mother->setExtraInfo("chiSquared", chi2);
591 mother->setExtraInfo("ndf", ndf);
592 } else {
593 mother->addExtraInfo("chiSquared", chi2);
594 mother->addExtraInfo("ndf", ndf);
595 }
596
597 mother->updateMomentum(
598 CLHEPToROOT::getLorentzVector(kmm.getMotherMomentum()),
599 CLHEPToROOT::getXYZVector(kmm.getMotherPosition()),
600 CLHEPToROOT::getTMatrixFSym(kmm.getMotherError()),
601 prob);
602 m_ErrorCode = KFitError::kNoError;
603 return m_ErrorCode;
604}
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::MassVertexFitKFit::getCHIsq
double getCHIsq(void) const override
Get a chi-square of the fit.
Definition: MassVertexFitKFit.cc:122
Belle2::analysis::MassVertexFitKFit::getVertexError
const CLHEP::HepSymMatrix getVertexError(void) const
Get a fitted vertex error matrix.
Definition: MassVertexFitKFit.cc:108
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:173
Belle2::analysis::MassVertexFitKFit::getVertex
const HepPoint3D getVertex(const int flag=KFitConst::kAfterFit) const
Get a vertex position.
Definition: MassVertexFitKFit.cc:89
Belle2::analysis::MassVertexFitKFit::getTrackVertexError
const CLHEP::HepMatrix getTrackVertexError(const int id) const
Get a vertex error matrix of the track.
Definition: MassVertexFitKFit.cc:129

Member Data Documentation

◆ m_AfterTrackVertexError

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

array of vertex error matrices after the fit.

Definition at line 126 of file MassVertexFitKFit.h.

◆ m_AfterVertex

HepPoint3D m_AfterVertex
private

Vertex position after the fit.

Definition at line 122 of file MassVertexFitKFit.h.

◆ m_AfterVertexError

CLHEP::HepSymMatrix m_AfterVertexError
private

Vertex error matrix after the fit.

Definition at line 124 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 119 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 129 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 131 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: