Belle II Software  release-08-01-10
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V0 Class Reference
Packages » mdst | Data objects » mdst data objects

Object holding information for V0s. More...

#include <V0.h>

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Public Member Functions

 V0 ()
 Constructor without arguments; needed for I/O.
 
 V0 (const std::pair< const Belle2::Track *, const Belle2::TrackFitResult * > &trackPairPositive, const std::pair< const Belle2::Track *, const Belle2::TrackFitResult * > &trackPairNegative, double vertexX, double vertexY, double vertexZ)
 Constructor taking two pairs of tracks and trackFitResults, and the fitted vertex coordinates.
 
std::pair< Track *, Track * > getTracks () const
 Get pair of yhe Tracks, that are part of the V0 particle.
 
std::pair< short, short > getTrackIndices () const
 Get indices of the Tracks, that are part of the V0 particle.
 
std::pair< TrackFitResult *, TrackFitResult * > getTrackFitResults () const
 Get pair of the TrackFitResults, that are part of the V0 particle.
 
std::pair< short, short > getTrackFitResultIndices () const
 Get indices of the TrackFitResults, that are part of the V0 particle.
 
Const::ParticleType getV0Hypothesis () const
 Get the hypothesis under which the V0 particle was created. More...
 
double getFittedVertexX () const
 Get the X coordinate of the fitted vertex.
 
double getFittedVertexY () const
 Get the Y coordinate of the fitted vertex.
 
double getFittedVertexZ () const
 Get the Z coordinate of the fitted vertex.
 
ROOT::Math::XYZVector getFittedVertexPosition () const
 Get the fitted vertex position.
 
void addRelationTo (const RelationsInterface< BASE > *object, float weight=1.0, const std::string &namedRelation="") const
 Add a relation from this object to another object (with caching). More...
 
void addRelationTo (const TObject *object, float weight=1.0, const std::string &namedRelation="") const
 Add a relation from this object to another object (no caching, can be quite slow). More...
 
void copyRelations (const RelationsInterface< BASE > *sourceObj)
 Copies all relations of sourceObj (pointing from or to sourceObj) to this object (including weights). More...
 
template<class TO >
RelationVector< TO > getRelationsTo (const std::string &name="", const std::string &namedRelation="") const
 Get the relations that point from this object to another store array. More...
 
template<class FROM >
RelationVector< FROM > getRelationsFrom (const std::string &name="", const std::string &namedRelation="") const
 Get the relations that point from another store array to this object. More...
 
template<class T >
RelationVector< T > getRelationsWith (const std::string &name="", const std::string &namedRelation="") const
 Get the relations between this object and another store array. More...
 
template<class TO >
TO * getRelatedTo (const std::string &name="", const std::string &namedRelation="") const
 Get the object to which this object has a relation. More...
 
template<class FROM >
FROM * getRelatedFrom (const std::string &name="", const std::string &namedRelation="") const
 Get the object from which this object has a relation. More...
 
template<class T >
T * getRelated (const std::string &name="", const std::string &namedRelation="") const
 Get the object to or from which this object has a relation. More...
 
template<class TO >
std::pair< TO *, float > getRelatedToWithWeight (const std::string &name="", const std::string &namedRelation="") const
 Get first related object & weight of relation pointing to an array. More...
 
template<class FROM >
std::pair< FROM *, float > getRelatedFromWithWeight (const std::string &name="", const std::string &namedRelation="") const
 Get first related object & weight of relation pointing from an array. More...
 
template<class T >
std::pair< T *, float > getRelatedWithWeight (const std::string &name="", const std::string &namedRelation="") const
 Get first related object & weight of relation pointing from/to an array. More...
 
virtual std::string getName () const
 Return a short name that describes this object, e.g. More...
 
virtual std::string getInfoHTML () const
 Return a short summary of this object's contents in HTML format. More...
 
std::string getInfo () const
 Return a short summary of this object's contents in raw text format. More...
 
std::string getArrayName () const
 Get name of array this object is stored in, or "" if not found.
 
int getArrayIndex () const
 Returns this object's array index (in StoreArray), or -1 if not found.
 

Protected Member Functions

TClonesArray * getArrayPointer () const
 Returns the pointer to the raw DataStore array holding this object (protected since these arrays are easy to misuse).
 

Private Member Functions

 ClassDef (V0, 4)
 Macro for ROOTification.
 

Private Attributes

short m_trackIndexPositive
 Indicates which positively charged track was used for this V0.
 
short m_trackIndexNegative
 Indicates which negatively charged track was used for this V0.
 
short m_trackFitResultIndexPositive
 Points to the new TrackFitResult of the positive Track.
 
short m_trackFitResultIndexNegative
 Points to the new TrackFitResult of the positive Track.
 
Double32_t m_fittedVertexX
 The X coordinate of the fitted vertex.
 
Double32_t m_fittedVertexY
 The Y coordinate of the fitted vertex.
 
Double32_t m_fittedVertexZ
 The Z coordinate of the fitted vertex.
 
DataStore::StoreEntry * m_cacheDataStoreEntry
 Cache of the data store entry to which this object belongs.
 
int m_cacheArrayIndex
 Cache of the index in the TClonesArray to which this object belongs.
 

Friends

class FixMergedObjectsModule
 

Detailed Description

Object holding information for V0s.

This object holds the indices of the Tracks used to create the V0, the the indices of the TrackFitResults belonging to that Tracks (with material effects and hits as appropriate for the point of the intersection of the Tracks), and the fitted vertex position (to be used as a starting point for vertex fitting at analysis level).

For additional information see [BELLE2-NOTE-TE-2015-034]. --> https://docs.belle2.org/record/307 Please note that the note was written before introducing the vertex position in this object.

Definition at line 34 of file V0.h.

Member Function Documentation

◆ addRelationTo() [1/2]

void addRelationTo ( const RelationsInterface< BASE > *  object,
float  weight = 1.0,
const std::string &  namedRelation = "" 
) const
inlineinherited

Add a relation from this object to another object (with caching).

Parameters
objectThe object to which the relation should point.
weightThe weight of the relation.
namedRelationAdditional name for the relation, or "" for the default naming

Definition at line 142 of file RelationsObject.h.

◆ addRelationTo() [2/2]

void addRelationTo ( const TObject *  object,
float  weight = 1.0,
const std::string &  namedRelation = "" 
) const
inlineinherited

Add a relation from this object to another object (no caching, can be quite slow).

Parameters
objectThe object to which the relation should point.
weightThe weight of the relation.
namedRelationAdditional name for the relation, or "" for the default naming

Definition at line 155 of file RelationsObject.h.

◆ copyRelations()

void copyRelations ( const RelationsInterface< BASE > *  sourceObj)
inlineinherited

Copies all relations of sourceObj (pointing from or to sourceObj) to this object (including weights).

Useful if you want to make a complete copy of a StoreArray object to make modifications to it, but retain all information on linked objects.

Note: this only works if sourceObj inherits from the same base (e.g. RelationsObject), and only for related objects that also inherit from the same base.

Definition at line 170 of file RelationsObject.h.

◆ getInfo()

std::string getInfo ( ) const
inlineinherited

Return a short summary of this object's contents in raw text format.

Returns the contents of getInfoHTML() while translating line-breaks etc.

Note
: You don't need to implement this function (it's not virtual), getInfoHTML() is enough.

Definition at line 370 of file RelationsObject.h.

◆ getInfoHTML()

virtual std::string getInfoHTML ( ) const
inlinevirtualinherited

Return a short summary of this object's contents in HTML format.

Reimplement this in your own class to provide useful output for display or debugging purposes. For example, you might do something like:

std::stringstream out;
out << "<b>PDG</b>: " << m_pdg << "<br>";
out << "<b>Covariance Matrix</b>: " << HTML::getString(getCovariance5()) << "<br>";
return out.str();
Belle2::HTML::getString
std::string getString(const TMatrixFBase &matrix, int precision=2, bool color=true)
get HTML table representing a matrix.
Definition: HTML.cc:24
See also
Particle::getInfoHTML() for a more complex example.
HTML for some utility functions.
Use getInfo() to get a raw text version of this output.

Reimplemented in RecoTrack, TRGSummary, TrackFitResult, Track, SoftwareTriggerResult, PIDLikelihood, MCParticle, Cluster, and Particle.

Definition at line 362 of file RelationsObject.h.

◆ getName()

virtual std::string getName ( ) const
inlinevirtualinherited

Return a short name that describes this object, e.g.

pi+ for an MCParticle.

Reimplemented in SpacePoint, MCParticle, and Particle.

Definition at line 344 of file RelationsObject.h.

◆ getRelated()

T* getRelated ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get the object to or from which this object has a relation.

Template Parameters
TThe class of objects to or from which the relation points.
Parameters
nameThe name of the store array to or from which the relation points. If empty the default store array name for class T will be used. If the special name "ALL" is given all store arrays containing objects of type T are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
The first related object or a null pointer.

Definition at line 278 of file RelationsObject.h.

◆ getRelatedFrom()

FROM* getRelatedFrom ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get the object from which this object has a relation.

Template Parameters
FROMThe class of objects from which the relation points.
Parameters
nameThe name of the store array from which the relation points. If empty the default store array name for class FROM will be used. If the special name "ALL" is given all store arrays containing objects of type FROM are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
The first related object or a null pointer.

Definition at line 263 of file RelationsObject.h.

◆ getRelatedFromWithWeight()

std::pair<FROM*, float> getRelatedFromWithWeight ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get first related object & weight of relation pointing from an array.

Template Parameters
FROMThe class of objects from which the relation points.
Parameters
nameThe name of the store array from which the relation points. If empty the default store array name for class FROM will be used. If the special name "ALL" is given all store arrays containing objects of type FROM are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
Pair of first related object and the relation weight, or (NULL, 1.0) if none found.

Definition at line 314 of file RelationsObject.h.

◆ getRelatedTo()

TO* getRelatedTo ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get the object to which this object has a relation.

Template Parameters
TOThe class of objects to which the relation points.
Parameters
nameThe name of the store array to which the relation points. If empty the default store array name for class TO will be used. If the special name "ALL" is given all store arrays containing objects of type TO are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
The first related object or a null pointer.

Definition at line 248 of file RelationsObject.h.

◆ getRelatedToWithWeight()

std::pair<TO*, float> getRelatedToWithWeight ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get first related object & weight of relation pointing to an array.

Template Parameters
TOThe class of objects to which the relation points.
Parameters
nameThe name of the store array to which the relation points. If empty the default store array name for class TO will be used. If the special name "ALL" is given all store arrays containing objects of type TO are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
Pair of first related object and the relation weight, or (NULL, 1.0) if none found.

Definition at line 297 of file RelationsObject.h.

◆ getRelatedWithWeight()

std::pair<T*, float> getRelatedWithWeight ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get first related object & weight of relation pointing from/to an array.

Template Parameters
TThe class of objects to or from which the relation points.
Parameters
nameThe name of the store array to or from which the relation points. If empty the default store array name for class T will be used. If the special name "ALL" is given all store arrays containing objects of type T are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
Pair of first related object and the relation weight, or (NULL, 1.0) if none found.

Definition at line 331 of file RelationsObject.h.

◆ getRelationsFrom()

RelationVector<FROM> getRelationsFrom ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get the relations that point from another store array to this object.

Template Parameters
FROMThe class of objects from which the relations point.
Parameters
nameThe name of the store array from which the relations point. If empty the default store array name for class FROM will be used. If the special name "ALL" is given all store arrays containing objects of type FROM are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
A vector of relations.

Definition at line 212 of file RelationsObject.h.

◆ getRelationsTo()

RelationVector<TO> getRelationsTo ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get the relations that point from this object to another store array.

Template Parameters
TOThe class of objects to which the relations point.
Parameters
nameThe name of the store array to which the relations point. If empty the default store array name for class TO will be used. If the special name "ALL" is given all store arrays containing objects of type TO are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
A vector of relations.

Definition at line 197 of file RelationsObject.h.

◆ getRelationsWith()

RelationVector<T> getRelationsWith ( const std::string &  name = "",
const std::string &  namedRelation = "" 
) const
inlineinherited

Get the relations between this object and another store array.

Relations in both directions are returned.

Template Parameters
TThe class of objects to or from which the relations point.
Parameters
nameThe name of the store array to or from which the relations point. If empty the default store array name for class T will be used. If the special name "ALL" is given all store arrays containing objects of type T are considered.
namedRelationAdditional name for the relation, or "" for the default naming
Returns
A vector of relations.

Definition at line 230 of file RelationsObject.h.

◆ getV0Hypothesis()

Const::ParticleType getV0Hypothesis ( ) const

Get the hypothesis under which the V0 particle was created.

This does not use an MC information, but just checks the particle type in the corresponding TrackFitResults.

Definition at line 35 of file V0.cc.

36 {
37  StoreArray<TrackFitResult> trackFitResults{};
38  const auto posParticleType = trackFitResults[m_trackFitResultIndexPositive]->getParticleType();
39  const auto negParticleType = trackFitResults[m_trackFitResultIndexNegative]->getParticleType();
40 
41  if ((posParticleType == Const::pion) && (negParticleType == Const::pion)) {
42  return Const::Kshort;
43  }
44  if ((posParticleType == Const::proton) && (negParticleType == Const::pion)) {
45  return Const::Lambda;
46  }
47  if ((posParticleType == Const::pion) && (negParticleType == Const::proton)) {
48  return Const::antiLambda;
49  }
50  if ((posParticleType == Const::electron) && (negParticleType == Const::electron)) {
51  return Const::photon;
52  }
53  return Const::unspecifiedParticle;
54 }
Belle2::Const::unspecifiedParticle
static const ParticleType unspecifiedParticle
Unspecified particle, used when no other particle type fits.
Definition: Const.h:674
Belle2::Const::Lambda
static const ParticleType Lambda
Lambda particle.
Definition: Const.h:670
Belle2::Const::pion
static const ChargedStable pion
charged pion particle
Definition: Const.h:652
Belle2::Const::antiLambda
static const ParticleType antiLambda
Anti-Lambda particle.
Definition: Const.h:671
Belle2::Const::proton
static const ChargedStable proton
proton particle
Definition: Const.h:654
Belle2::Const::Kshort
static const ParticleType Kshort
K^0_S particle.
Definition: Const.h:668
Belle2::Const::photon
static const ParticleType photon
photon particle
Definition: Const.h:664
Belle2::Const::electron
static const ChargedStable electron
electron particle
Definition: Const.h:650
Belle2::StoreArray
Accessor to arrays stored in the data store.
Definition: StoreArray.h:113
Belle2::V0::m_trackFitResultIndexNegative
short m_trackFitResultIndexNegative
Points to the new TrackFitResult of the positive Track.
Definition: V0.h:97
Belle2::V0::m_trackFitResultIndexPositive
short m_trackFitResultIndexPositive
Points to the new TrackFitResult of the positive Track.
Definition: V0.h:94
The documentation for this class was generated from the following files: