Template Class ZScanVertexFinder

• Defined in File ZScanVertexFinder.hpp

Nested Relationships

Nested Types

• Struct ZScanVertexFinder::Config

• Struct ZScanVertexFinder::State

Class Documentation

template<typename vfitter_t>
class Acts::ZScanVertexFinder

Implements a vertex finder based on the mode of z0 values:

1. Determines the mode value of all input track z0 values

2. If no contraint is given, returns (0,0, z0_mode) as vertex position

3. If vertex contraint is given with x=x_constr and y=y_constr, the returned vertex position will be (x_constr, y_constr, z0_mode).

Public Types

using InputTrack_t = typename vfitter_t::InputTrack_t

Public Functions

template<typename T = InputTrack_t, std::enable_if_t<std::is_same<T, BoundTrackParameters>::value, int> = 0>
ZScanVertexFinder(const Config &cfg, std::unique_ptr<const Logger> logger = getDefaultLogger("ZScanVertexFinder", Logging::INFO))

Constructor used if InputTrack_t type == BoundTrackParameters.

Parameters

• cfg: Configuration object

• logger: The logging instance

ZScanVertexFinder(const Config &cfg, std::function<BoundTrackParameters(InputTrack_t)> func, std::unique_ptr<const Logger> logger = getDefaultLogger("ZScanVertexFinder", Logging::INFO), )

Constructor for user-defined InputTrack_t type =! BoundTrackParameters.

Parameters

• cfg: Configuration object

• func: Function extracting BoundTrackParameters from InputTrack_t object

• logger: Logging instance

Result<std::vector<Vertex<InputTrack_t>>> find(const std::vector<const InputTrack_t*> &trackVector, const VertexingOptions<InputTrack_t> &vertexingOptions, State &state) const

Function that determines single vertex, based on z0 values of input tracks, using a Half Sample Mode algorithm.

Return

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

Parameters

• trackVector: Input track collection

• vertexingOptions: Vertexing options

• state: State for fulfilling correct interface

struct Config

Public Functions

Config(const ImpactPointEstimator<InputTrack_t, Propagator_t> &ipEst)

Finder configuration.

Parameters

• ipEst: ImpactPointEstimator

Public Members

float constraintcutoff = 9.

float constrainttemp = 1.

bool disableAllWeights = false

double expPt = 1.

ImpactPointEstimator<InputTrack_t, Propagator_t> ipEstimator

double minPt = 0.4 * UnitConstants::GeV

double minWeight = 0.01

FsmwMode1dFinder mode1dFinder

bool useLogPt = true

bool usePt = false

struct State

for fulfilling interface