Class Acts::FullBilloirVertexFitter¶
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template<typename input_track_t, typename linearizer_t>
class FullBilloirVertexFitter¶ Vertex fitter class implementing the Billoir vertex fitter.
This class implements the Billoir vertex fitter:
Fast vertex fitting with a local parametrization of tracks Author(s) Billoir, P ; Qian, S In: Nucl. Instrum. Methods Phys. Res., A 311 (1992) 139-150 DOI 10.1016/0168-9002(92)90859-3
- Template Parameters
input_track_t – Track object type
linearizer_t – Track linearizer type
Public Types
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using InputTrack_t = input_track_t¶
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using Linearizer_t = linearizer_t¶
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using Propagator_t = typename linearizer_t::Propagator_t¶
Public Functions
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template<typename T = input_track_t, std::enable_if_t<std::is_same<T, BoundTrackParameters>::value, int> = 0>
inline FullBilloirVertexFitter(const Config &cfg)¶ Constructor used if input_track_t type == BoundTrackParameters.
- Parameters
cfg – Configuration object
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inline FullBilloirVertexFitter(const Config &cfg, std::function<BoundTrackParameters(input_track_t)> func)¶
Constructor for user-defined input_track_t type =! BoundTrackParameters.
- Parameters
cfg – Configuration object
func – Function extracting BoundTrackParameters from input_track_t object
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Result<Vertex<input_track_t>> fit(const std::vector<const input_track_t*> ¶mVector, const linearizer_t &linearizer, const VertexingOptions<input_track_t> &vertexingOptions, State &state) const¶
Fit method, fitting vertex for provided tracks with constraint.
- Parameters
paramVector – Vector of track objects to fit vertex to
linearizer – The track linearizer
vertexingOptions – Vertexing options
state – The state object
- Returns
Fitted vertex
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struct State¶
Public Functions
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inline State(MagneticFieldProvider::Cache fieldCache)¶
The state constructor.
- Parameters
fieldCache – The magnetic field cache
Public Members
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Linearizer_t::State linearizerState¶
The linearizer state.
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inline State(MagneticFieldProvider::Cache fieldCache)¶