Finds a vertex seed based on the maximum of a track density function. Each track is modelled as a 2d density function around its d0/z0 perigee parameter values. The z seed position is then found as the position of the maximum of all summed track density functions. More...

#include <acts/blob/sPHENIX/Core/include/Acts/Vertexing/TrackDensityVertexFinder.hpp>

Collaboration diagram for Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >:

Classes
struct	Config
	The Config struct. More...

struct	State
	for fulfilling interface More...

Public Member Functions
Result< std::vector< Vertex < InputTrack_t > > >	find (const std::vector< const InputTrack_t * > &trackVector, const VertexingOptions< InputTrack_t > &vertexingOptions, State &state) const
	Function that finds single vertex candidate.

template<typename T = InputTrack_t, std::enable_if_t< std::is_same< T, BoundTrackParameters >::value, int > = 0>
	TrackDensityVertexFinder (const Config &cfg)
	Constructor used if InputTrack_t type == BoundTrackParameters.

	m_extractParameters (func)

	TrackDensityVertexFinder (const std::function< BoundTrackParameters(InputTrack_t)> &func)
	Constructor for user-defined InputTrack_t type =! BoundTrackParameters with default Config object.

Private Types
using	InputTrack_t = typename vfitter_t::InputTrack_t

Private Attributes
Config	m_cfg

std::function < BoundTrackParameters(InputTrack_t)>	m_extractParameters
	Function to extract track parameters, InputTrack_t objects are BoundTrackParameters by default, function to be overwritten to return BoundTrackParameters for other InputTrack_t objects.

Detailed Description

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>
class Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >

Finds a vertex seed based on the maximum of a track density function. Each track is modelled as a 2d density function around its d0/z0 perigee parameter values. The z seed position is then found as the position of the maximum of all summed track density functions.

Ref. (1): https://cds.cern.ch/record/2670380

Template Parameters

vfitter_t	The vertex fitter type (needed to fulfill concept)
track_density_t	The track density type

Definition at line 37 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 37 of file TrackDensityVertexFinder.hpp

Member Typedef Documentation

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>

using Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::InputTrack_t = typename vfitter_t::InputTrack_t

private

Definition at line 44 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 44 of file TrackDensityVertexFinder.hpp

Constructor & Destructor Documentation

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>

template<typename T = InputTrack_t, std::enable_if_t< std::is_same< T, BoundTrackParameters >::value, int > = 0>

Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::TrackDensityVertexFinder ( const Config & cfg )

inline

Constructor used if InputTrack_t type == BoundTrackParameters.

Parameters

cfg	Configuration object

Definition at line 75 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 75 of file TrackDensityVertexFinder.hpp

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>

Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::TrackDensityVertexFinder ( const std::function< BoundTrackParameters(InputTrack_t)> & func )

inline

Constructor for user-defined InputTrack_t type =! BoundTrackParameters with default Config object.

Parameters

func	Function extracting BoundTrackParameters from InputTrack_t object

Definition at line 102 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 102 of file TrackDensityVertexFinder.hpp

Member Function Documentation

template<typename vfitter_t , typename track_density_t >

auto Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::find	(	const std::vector< const InputTrack_t * > &	trackVector,
		const VertexingOptions< InputTrack_t > &	vertexingOptions,
		State &	state
	)		const

Function that finds single vertex candidate.

Parameters

trackVector	Input track collection
vertexingOptions	Vertexing options
state	State for fulfilling interfaces

Returns: Vector of vertices, filled with a single vertex (for consistent interfaces)

Definition at line 10 of file TrackDensityVertexFinder.ipp.

View newest version in sPHENIX GitHub at line 10 of file TrackDensityVertexFinder.ipp

References Acts::eZ, Acts::Vertex< input_track_t >::setCovariance(), Acts::VertexingOptions< input_track_t >::vertexConstraint, and z.

Here is the call graph for this function:

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>

Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::m_extractParameters ( func )

inline

Definition at line 95 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 95 of file TrackDensityVertexFinder.hpp

Member Data Documentation

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>

Config Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::m_cfg

private

Definition at line 107 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 107 of file TrackDensityVertexFinder.hpp

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>

std::function<BoundTrackParameters(InputTrack_t)> Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >::m_extractParameters

private

Function to extract track parameters, InputTrack_t objects are BoundTrackParameters by default, function to be overwritten to return BoundTrackParameters for other InputTrack_t objects.

Parameters

InputTrack_t object to extract track parameters from

Definition at line 114 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 114 of file TrackDensityVertexFinder.hpp

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

acts/blob/sPHENIX/Core/include/Acts/Vertexing/TrackDensityVertexFinder.hpp
acts/blob/sPHENIX/Core/include/Acts/Vertexing/TrackDensityVertexFinder.ipp

Classes

Public Member Functions

Private Types

Private Attributes

Detailed Description

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>> class Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

template<typename vfitter_t, typename track_density_t = GaussianTrackDensity<typename vfitter_t::InputTrack_t>>
class Acts::TrackDensityVertexFinder< vfitter_t, track_density_t >