Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t > Class Template Reference

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

Collaboration diagram for Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >:

Classes
struct	Config
	Configuration struct. More...
struct	State
	State struct. More...

Public Types
using	Propagator_t = propagator_t

Public Member Functions
	HelicalTrackLinearizer (const Config &config, std::unique_ptr< const Logger > _logger=getDefaultLogger("HelTrkLinProp", Logging::INFO))
	Constructor.

Private Member Functions
const Logger &	logger () const

Private Attributes
const Config	m_cfg
	Configuration object.
std::unique_ptr< const Logger >	m_logger

Detailed Description

template<typename propagator_t, typename propagator_options_t = PropagatorOptions<>>
class Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >

Linearizes the track parameters at the PCA to a user-provided point (linPoint). The track parameters are written as a function of the global PCA position and the momentum of the particle at the PCA. The linearization then reads (see Eq. 5.7 in Ref. (1)):

q = A (r - r_0) + B (p - p_0) + c,

where q are the Perigee parameters wrt linPoint, {r_0} r is the {initial} 4D PCA position, {p_0} p is the {initial} momentum (phi, theta, q/p) at the PCA, and c is the constant term of the expansion. A and B are matrices of derivatives, denoted hereafter as "positionJacobian" and "momentumJacobian" respectively.

This class computes A and B using the analytic formulae of Ref. (1).

Ref. (1) - CERN-THESIS-2010-027, Giacinto Piacquadio (Freiburg U.)

Template Parameters

propagator_t	Propagator type
propagator_options_t	Propagator options type

Definition at line 46 of file HelicalTrackLinearizer.hpp.

View newest version in sPHENIX GitHub at line 46 of file HelicalTrackLinearizer.hpp

Member Typedef Documentation

template<typename propagator_t , typename propagator_options_t = PropagatorOptions<>>

using Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::Propagator_t = propagator_t

Definition at line 48 of file HelicalTrackLinearizer.hpp.

View newest version in sPHENIX GitHub at line 48 of file HelicalTrackLinearizer.hpp

Constructor & Destructor Documentation

template<typename propagator_t , typename propagator_options_t = PropagatorOptions<>>

Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::HelicalTrackLinearizer ( const Config &  config, std::unique_ptr< const Logger >  _logger = getDefaultLogger("HelTrkLinProp", Logging::INFO)  )

inline

Constructor.

Parameters

config	Configuration object
_logger	a logger instance

Definition at line 91 of file HelicalTrackLinearizer.hpp.

View newest version in sPHENIX GitHub at line 91 of file HelicalTrackLinearizer.hpp

Member Function Documentation

template<typename propagator_t , typename propagator_options_t = PropagatorOptions<>>

const Logger& Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::logger ( ) const

inlineprivate

Definition at line 122 of file HelicalTrackLinearizer.hpp.

View newest version in sPHENIX GitHub at line 122 of file HelicalTrackLinearizer.hpp

References Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::m_logger.

Member Data Documentation

template<typename propagator_t , typename propagator_options_t = PropagatorOptions<>>

const Config Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::m_cfg

private

Initial value:

{}

  
  Result<LinearizedTrack> linearizeTrack(const BoundTrackParameters& params,
                                         double linPointTime,
                                         const Surface& perigeeSurface,
                                         const Acts::GeometryContext& gctx,
                                         const Acts::MagneticFieldContext& mctx,
                                         State& state) const

Configuration object.

Definition at line 94 of file HelicalTrackLinearizer.hpp.

View newest version in sPHENIX GitHub at line 94 of file HelicalTrackLinearizer.hpp

template<typename propagator_t , typename propagator_options_t = PropagatorOptions<>>

std::unique_ptr<const Logger> Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::m_logger

private

Definition at line 120 of file HelicalTrackLinearizer.hpp.

View newest version in sPHENIX GitHub at line 120 of file HelicalTrackLinearizer.hpp

Referenced by Acts::HelicalTrackLinearizer< propagator_t, propagator_options_t >::logger().

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

• acts/blob/sPHENIX/Core/include/Acts/Vertexing/HelicalTrackLinearizer.hpp