Acts::TrackDensityVertexFinder< vfitter_t, track_density_t > Class Template Reference

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
	State struct 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::VertexingOptions< input_track_t >::constraint, eZ, m_cfg(), Acts::Vertex< input_track_t >::setCovariance(), and physmon_track_finding_ttbar::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.

Definition at line 112 of file TrackDensityVertexFinder.hpp.

View newest version in sPHENIX GitHub at line 112 of file TrackDensityVertexFinder.hpp

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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