Determine IP position and error from the tracks in an event by simple fit. More...
#include <PerEventIPFitter.h>
Protected Attributes | |
| std::string | _InputRPCollectionName |
| std::string | _VertexCollectionName |
|
vertex_lcfi::Algo< Event *, Vertex * > * | _IPFitter |
| FloatVec | _DefaultIPPos |
| FloatVec | _DefaultIPErr |
| double | _ProbThreshold |
| int | _nRun |
| int | _nEvt |
Detailed Description
Determine IP position and error from the tracks in an event by simple fit.
Inputs
| Name | Type | Represents |
| InputRPCollectionName | ReconstructedParticle | Tracks to be fit |
Outputs
| Name | Type | Represents |
| VertexCollectionName | Vertex | Fitted IP |
Description
This processor fits a set of LCIO ReconstructedParticles (which must have an LCIO Track attached to be used) to a common point. This is performed by iterative fitting, with removal of the track with highest chi-squared at each iteration until the fit reaches the probability threshold. If only one track remains then the default IP position and error are used. The result is stored as an LCIO Vertex.
This processor is highly unoptimised and untuned, and may take a long time to execute on a large set of tracks.
Currently uses VertexFitterLSM (from ZVTOP) to perform fitting.
- Parameters
-
InputRPCollection Name of the ReconstructedParticle collection to be fit VertexCollectionName Name of the output Vertex collection DefaultIPPos Length 3 Float Vector of position (x,y,z) returned (as LCIO Vertex) if no fit is found DefaultIPErr Length 6 Float Vector of covariance (lower symmetric) returned (as LCIO Vertex) if no fit is found ProbabilityThreshold Once the vertex is above this probability it is returned
Definition at line 49 of file PerEventIPFitter.h.
The documentation for this class was generated from the following files:
