Utility for the track selection - used in various calibration modules. More...

#include <TrackSelector.h>

Public Types
enum	EType { c_undefined = 0 , c_dimuon = 1 , c_bhabha = 2 , c_cosmics = 3 }
	enumerators for possible data sample types (skims) More...

Public Member Functions
	TrackSelector ()
	Default constructor.

	TrackSelector (const std::string &sampleName)
	Useful constructor.

void	setMinMomentum (double minMomentum)
	Sets momentum cut (used for "cosmics" only)

void	setDeltaEcms (double deltaEcms)
	Sets cut on c.m.s.

void	setCutOnPOCA (double dr, double dz)
	Sets cut on point of closest approach to (0, 0, 0)

void	setCutOnLocalZ (double minZ, double maxZ)
	Sets cut on local z coordinate (module frame) of the track extrapolated to TOP.

const std::string &	getSampleName () const
	Returns sample name.

double	getMinMomentum () const
	Returns momentum cut.

double	getDeltaEcms () const
	Returns c.m.s.

double	getDr () const
	Returns POCA cut in r.

double	getDz () const
	Returns POCA cut in z.

double	getMinZ () const
	Returns cut on local z.

double	getMaxZ () const
	Returns cut on local z.

const Const::ChargedStable &	getChargedStable () const
	Returns track hypothesis.

const ROOT::Math::XYZVector &	getPOCAPosition () const
	Returns position of POCA of the track in last isSelected call.

const ROOT::Math::XYZVector &	getPOCAMomentum () const
	Returns momentum vector at POCA of the track in last isSelected call.

double	getCMSEnergy () const
	Returns c.m.s energy of the track in last isSelected call.

const ROOT::Math::XYZPoint &	getLocalPosition () const
	Returns position at TOP in local frame of the track in last isSelected call.

const ROOT::Math::XYZVector &	getLocalMomentum () const
	Returns momentum at TOP in local frame of the track in last isSelected call.

bool	isSelected (const TOPTrack &track) const
	Returns selection status.

Private Attributes
EType	m_sampleType = c_undefined
	data sample (skim) type

std::string	m_sampleName
	data sample (skim) name

double	m_minMomentum = 0
	minimal track momentum if sample is "cosmics"

double	m_deltaEcms = 0
	c.m.s energy window for "dimuon" or "bhabha"

double	m_dr = 0
	cut on POCA in r

double	m_dz = 0
	cut on POCA in z

double	m_minZ = 0
	minimal local z of extrapolated hit

double	m_maxZ = 0
	maximal local z of extrapolated hit

Const::ChargedStable	m_chargedStable = Const::muon
	track hypothesis

ROOT::Math::XYZVector	m_pocaPosition
	position of POCA

ROOT::Math::XYZVector	m_pocaMomentum
	momentum at POCA

double	m_cmsEnergy = 0
	c.m.s.

ROOT::Math::XYZPoint	m_localPosition
	position at TOP in local (module) frame

ROOT::Math::XYZVector	m_localMomentum
	momentum at TOP in local (module) frame

Detailed Description

Utility for the track selection - used in various calibration modules.

Definition at line 27 of file TrackSelector.h.

Member Enumeration Documentation

◆ EType

enum EType

enumerators for possible data sample types (skims)

Definition at line 34 of file TrackSelector.h.

                 {
        c_undefined = 0,
        c_dimuon = 1,
        c_bhabha = 2,
        c_cosmics = 3
      };

Constructor & Destructor Documentation

◆ TrackSelector() [1/2]

TrackSelector ( )

inline

Default constructor.

Definition at line 44 of file TrackSelector.h.

45 {}

◆ TrackSelector() [2/2]

TrackSelector ( const std::string & sampleName )

explicit

Useful constructor.

Parameters

sampleName data sample name, one of dimuon, bhabha or cosmics

Definition at line 23 of file TrackSelector.cc.

                                                           : m_sampleName(sampleName)
    {
      if (sampleName == "dimuon") {
        m_sampleType = c_dimuon;
        m_chargedStable = Const::muon;
      } else if (sampleName == "bhabha") {
        m_sampleType = c_bhabha;
        m_chargedStable = Const::electron;
      } else if (sampleName == "cosmics") {
        m_sampleType = c_cosmics;
        m_chargedStable = Const::muon;
      } else {
        m_sampleType = c_undefined;
        m_sampleName = "undefined";
        B2ERROR("TOP::TrackSelector: unknown data sample."
                << LogVar("name", sampleName));
      }
    }

Member Function Documentation

◆ getChargedStable()

const Const::ChargedStable & getChargedStable ( ) const

inline

Returns track hypothesis.

Definition at line 132 of file TrackSelector.h.

132{return m_chargedStable;}

◆ getCMSEnergy()

double getCMSEnergy ( ) const

inline

Returns c.m.s energy of the track in last isSelected call.

Returns: c.m.s. energy if track is selected, otherwise undefined

Definition at line 150 of file TrackSelector.h.

150{return m_cmsEnergy;}

Belle2::TOP::TrackSelector::m_cmsEnergy

double m_cmsEnergy

c.m.s.

Definition: TrackSelector.h:186

◆ getDeltaEcms()

double getDeltaEcms ( ) const

inline

Returns c.m.s.

energy cut

Returns: size of the energy window

Definition at line 103 of file TrackSelector.h.

103{return m_deltaEcms;}

Belle2::TOP::TrackSelector::m_deltaEcms

double m_deltaEcms

c.m.s energy window for "dimuon" or "bhabha"

Definition: TrackSelector.h:176

◆ getDr()

double getDr ( ) const

inline

Returns POCA cut in r.

Returns: maximal radius in x-y plane

Definition at line 109 of file TrackSelector.h.

109{return m_dr;}

Belle2::TOP::TrackSelector::m_dr

double m_dr

cut on POCA in r

Definition: TrackSelector.h:177

◆ getDz()

double getDz ( ) const

inline

Returns POCA cut in z.

Returns: cut in z coordinate (|z| < dz/2)

Definition at line 115 of file TrackSelector.h.

115{return m_dz;}

Belle2::TOP::TrackSelector::m_dz

double m_dz

cut on POCA in z

Definition: TrackSelector.h:178

◆ getLocalMomentum()

const ROOT::Math::XYZVector & getLocalMomentum ( ) const

inline

Returns momentum at TOP in local frame of the track in last isSelected call.

Returns: momentum vector in local frame if track is selected, otherwise undefined

Definition at line 162 of file TrackSelector.h.

162{return m_localMomentum;}

Belle2::TOP::TrackSelector::m_localMomentum

ROOT::Math::XYZVector m_localMomentum

momentum at TOP in local (module) frame

Definition: TrackSelector.h:188

◆ getLocalPosition()

const ROOT::Math::XYZPoint & getLocalPosition ( ) const

inline

Returns position at TOP in local frame of the track in last isSelected call.

Returns: position in local frame if track is selected, otherwise undefined

Definition at line 156 of file TrackSelector.h.

156{return m_localPosition;}

Belle2::TOP::TrackSelector::m_localPosition

ROOT::Math::XYZPoint m_localPosition

position at TOP in local (module) frame

Definition: TrackSelector.h:187

◆ getMaxZ()

double getMaxZ ( ) const

inline

Returns cut on local z.

Returns: maximal local z of extrapolated hit

Definition at line 127 of file TrackSelector.h.

127{return m_maxZ;}

Belle2::TOP::TrackSelector::m_maxZ

double m_maxZ

maximal local z of extrapolated hit

Definition: TrackSelector.h:180

◆ getMinMomentum()

double getMinMomentum ( ) const

inline

Returns momentum cut.

Returns: minimal momentum

Definition at line 97 of file TrackSelector.h.

97{return m_minMomentum;}

Belle2::TOP::TrackSelector::m_minMomentum

double m_minMomentum

minimal track momentum if sample is "cosmics"

Definition: TrackSelector.h:175

◆ getMinZ()

double getMinZ ( ) const

inline

Returns cut on local z.

Returns: minimal local z of extrapolated hit

Definition at line 121 of file TrackSelector.h.

121{return m_minZ;}

Belle2::TOP::TrackSelector::m_minZ

double m_minZ

minimal local z of extrapolated hit

Definition: TrackSelector.h:179

◆ getPOCAMomentum()

const ROOT::Math::XYZVector & getPOCAMomentum ( ) const

inline

Returns momentum vector at POCA of the track in last isSelected call.

Returns: momentum vector if track is selected, otherwise undefined

Definition at line 144 of file TrackSelector.h.

144{return m_pocaMomentum;}

Belle2::TOP::TrackSelector::m_pocaMomentum

ROOT::Math::XYZVector m_pocaMomentum

momentum at POCA

Definition: TrackSelector.h:185

◆ getPOCAPosition()

const ROOT::Math::XYZVector & getPOCAPosition ( ) const

inline

Returns position of POCA of the track in last isSelected call.

Returns: POCA if track is selected, otherwise undefined

Definition at line 138 of file TrackSelector.h.

138{return m_pocaPosition;}

Belle2::TOP::TrackSelector::m_pocaPosition

ROOT::Math::XYZVector m_pocaPosition

position of POCA

Definition: TrackSelector.h:184

◆ getSampleName()

const std::string & getSampleName ( ) const

inline

Returns sample name.

Returns: sample name

Definition at line 91 of file TrackSelector.h.

91{return m_sampleName;}

◆ isSelected()

bool isSelected ( const TOPTrack & track ) const

Returns selection status.

Parameters

track track extrapolated to TOP

Returns: true if track passes selection criteria

Definition at line 43 of file TrackSelector.cc.

    {
 
      if (m_sampleType == c_undefined) {
        B2ERROR("TOP::TrackSelector:isSelected sample type is undefined, returning false");
        return false;
      }
 
      if (not trk.isValid()) return false;
 
      const auto* fit = trk.getTrack()->getTrackFitResultWithClosestMass(m_chargedStable);
      if (not fit) return false;
 
      // cut on POCA
      m_pocaPosition = fit->getPosition();
      if (m_pocaPosition.Rho() > m_dr) return false;
      if (fabs(m_pocaPosition.Z()) > m_dz) return false;
 
      // momentum/energy cut
      m_pocaMomentum = fit->getMomentum();
      if (m_sampleType == c_cosmics) {
        if (m_pocaMomentum.R() < m_minMomentum) return false;
      } else if (m_sampleType == c_dimuon or m_sampleType == c_bhabha) {
        ROOT::Math::PxPyPzMVector lorentzLab(m_pocaMomentum.X(), m_pocaMomentum.Y(), m_pocaMomentum.Z(), m_chargedStable.getMass());
        PCmsLabTransform T;
        auto lorentzCms = T.labToCms(lorentzLab);
        m_cmsEnergy = lorentzCms.energy();
        double dE = m_cmsEnergy - T.getCMSEnergy() / 2;
        if (fabs(dE) > m_deltaEcms) return false;
      } else {
        return false;
      }
 
      // cut on local z
      const auto* geo = TOPGeometryPar::Instance()->getGeometry();
      const auto& module = geo->getModule(trk.getModuleID());
      m_localPosition = module.pointToLocal(static_cast<ROOT::Math::XYZPoint>(trk.getExtHit()->getPosition()));
      m_localMomentum = module.momentumToLocal(trk.getExtHit()->getMomentum());
      if (m_localPosition.Z() < m_minZ or m_localPosition.Z() > m_maxZ) return false;
 
      return true;
    }

◆ setCutOnLocalZ()

void setCutOnLocalZ	(	double	minZ,
		double	maxZ
	)

inline

Sets cut on local z coordinate (module frame) of the track extrapolated to TOP.

Parameters

minZ	minimal z
maxZ	maximal z

Definition at line 81 of file TrackSelector.h.

      {
        m_minZ = minZ;
        m_maxZ = maxZ;
      }

◆ setCutOnPOCA()

void setCutOnPOCA	(	double	dr,
		double	dz
	)

inline

Sets cut on point of closest approach to (0, 0, 0)

Parameters

dr	maximal radius in x-y plane
dz	cut in z coordinate (\|z\| < dz/2)

Definition at line 70 of file TrackSelector.h.

      {
        m_dr = dr;
        m_dz = dz;
      }

◆ setDeltaEcms()

void setDeltaEcms ( double deltaEcms )

inline

Sets cut on c.m.s.

energy (used for "dimuon" and "bhabha")

Parameters

deltaEcms size of energy window

Definition at line 63 of file TrackSelector.h.

63{m_deltaEcms = deltaEcms;}

◆ setMinMomentum()

void setMinMomentum ( double minMomentum )

inline

Sets momentum cut (used for "cosmics" only)

Parameters

minMomentum minimal track momentum

Definition at line 57 of file TrackSelector.h.

57{m_minMomentum = minMomentum;}

Member Data Documentation

◆ m_chargedStable

Const::ChargedStable m_chargedStable = Const::muon

private

track hypothesis

Definition at line 181 of file TrackSelector.h.

◆ m_cmsEnergy

double m_cmsEnergy = 0

mutableprivate

c.m.s.

energy of track

Definition at line 186 of file TrackSelector.h.

◆ m_deltaEcms

double m_deltaEcms = 0

private

c.m.s energy window for "dimuon" or "bhabha"

Definition at line 176 of file TrackSelector.h.

◆ m_dr

double m_dr = 0

private

cut on POCA in r

Definition at line 177 of file TrackSelector.h.

◆ m_dz

double m_dz = 0

private

cut on POCA in z

Definition at line 178 of file TrackSelector.h.

◆ m_localMomentum

ROOT::Math::XYZVector m_localMomentum

mutableprivate

momentum at TOP in local (module) frame

Definition at line 188 of file TrackSelector.h.

◆ m_localPosition

ROOT::Math::XYZPoint m_localPosition

mutableprivate

position at TOP in local (module) frame

Definition at line 187 of file TrackSelector.h.

◆ m_maxZ

double m_maxZ = 0

private

maximal local z of extrapolated hit

Definition at line 180 of file TrackSelector.h.

◆ m_minMomentum

double m_minMomentum = 0

private

minimal track momentum if sample is "cosmics"

Definition at line 175 of file TrackSelector.h.

◆ m_minZ

double m_minZ = 0

private

minimal local z of extrapolated hit

Definition at line 179 of file TrackSelector.h.

◆ m_pocaMomentum

ROOT::Math::XYZVector m_pocaMomentum

mutableprivate

momentum at POCA

Definition at line 185 of file TrackSelector.h.

◆ m_pocaPosition

ROOT::Math::XYZVector m_pocaPosition

mutableprivate

position of POCA

Definition at line 184 of file TrackSelector.h.

◆ m_sampleName

std::string m_sampleName

private

data sample (skim) name

Definition at line 174 of file TrackSelector.h.

◆ m_sampleType

EType m_sampleType = c_undefined

private

data sample (skim) type

Definition at line 173 of file TrackSelector.h.

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

top/utilities/include/TrackSelector.h
top/utilities/src/TrackSelector.cc

Public Types

Public Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

◆ EType

Constructor & Destructor Documentation

◆ TrackSelector() [1/2]

◆ TrackSelector() [2/2]

Member Function Documentation

◆ getChargedStable()

◆ getCMSEnergy()

◆ getDeltaEcms()

◆ getDr()

◆ getDz()

◆ getLocalMomentum()

◆ getLocalPosition()

◆ getMaxZ()

◆ getMinMomentum()

◆ getMinZ()

◆ getPOCAMomentum()

◆ getPOCAPosition()

◆ getSampleName()

◆ isSelected()

◆ setCutOnLocalZ()

◆ setCutOnPOCA()

◆ setDeltaEcms()

◆ setMinMomentum()

Member Data Documentation

◆ m_chargedStable

◆ m_cmsEnergy

◆ m_deltaEcms

◆ m_dr

◆ m_dz

◆ m_localMomentum

◆ m_localPosition

◆ m_maxZ

◆ m_minMomentum

◆ m_minZ

◆ m_pocaMomentum

◆ m_pocaPosition

◆ m_sampleName

◆ m_sampleType