Struct Acts::Experimental::Chi2FitterOptions

template<typename traj_t>
struct Chi2FitterOptions

Combined options for the GX2F fitter.

Template Parameters

traj_t – The trajectory type

Public Functions

inline Chi2FitterOptions(const GeometryContext &gctx, const MagneticFieldContext &mctx, std::reference_wrapper<const CalibrationContext> cctx, Chi2FitterExtensions<traj_t> extensions_, const PropagatorPlainOptions &pOptions, bool mScattering = false, bool eLoss = false, int nIter = 1, bool calcFinalChi2_ = true, const FreeToBoundCorrection &freeToBoundCorrection_ = FreeToBoundCorrection(false))

PropagatorOptions with context.

  • gctx – The goemetry context for this fit

  • mctx – The magnetic context for this fit

  • cctx – The calibration context for this fit

  • extensions_ – The chi2 extensions

  • pOptions – The plain propagator options

  • mScattering – Whether to include multiple scattering

  • eLoss – Whether to include energy loss

  • nIter – Number of update steps to the parameters

  • calcFinalChi2_ – Whether to run additional propagation to calculate final chi2

  • freeToBoundCorrection_ – Correction for non-linearity effect during transform from free to bound

Chi2FitterOptions() = delete

Contexts are required and the options must not be default-constructible.

Public Members

bool calcFinalChi2 = true

Whether to do an additional propagation step, just to get the latest chi2 value.

std::reference_wrapper<const CalibrationContext> calibrationContext

context object for the calibration

bool energyLoss = false

Whether to consider energy loss.

Chi2FitterExtensions<traj_t> extensions
FreeToBoundCorrection freeToBoundCorrection

Whether to include non-linear correction during global to local transformation.

std::reference_wrapper<const GeometryContext> geoContext

Context object for the geometry.

std::reference_wrapper<const MagneticFieldContext> magFieldContext

Context object for the magnetic field.

bool multipleScattering = false

Whether to consider multiple scattering.

int nUpdates = 1

Number of iterations to improve chi2.

PropagatorPlainOptions propagatorPlainOptions

The trivial propagator options.