Find vertices in a jet using topological ZVTOP-ZVRES algorithm. More...
#include <ZVTOPZVRESProcessor.h>
Protected Attributes | |
| std::string | _JetRPCollectionName |
| std::string | _DecayChainRPTracksCollectionName |
| std::string | _VertexCollectionName |
| std::string | _IPVertexCollectionName |
| std::string | _DecayChainCollectionName |
|
vertex_lcfi::Algo< Jet *, DecayChain * > * | _ZVRES |
| bool | _ManualPrimaryVertex |
| FloatVec | _ManualPrimaryVertexPos |
| FloatVec | _ManualPrimaryVertexErr |
| double | _IPWeighting |
| double | _JetWeightingEnergyScaling |
| double | _TwoTrackCut |
| double | _TrackTrimCut |
| double | _ResolverCut |
| bool | _OutputTrackChi2 |
| int | _nRun |
| int | _nEvt |
Detailed Description
Find vertices in a jet using topological ZVTOP-ZVRES algorithm.
Input
| Name | Type | Represents |
| JetRPCollectionName | ReconstructedParticle | Jets to be Vertexed (eg from SatoruJetFinderProcessor |
| IPVertexCollectionName | Vertex | Event Interaction Point (eg from PerEventIPFitterProcessor) - optional can be manually specified |
Output
| Name | Type | Represents |
| DecayChainCollectionName | ReconstructedParticle | Decay Chains (set of found vertices) |
| VertexCollection | Vertex | Found vertices |
| DecayChainRPTracksCollectionName | ReconstructedParticle | Tracks used in Decay Chains and found vertices |
Description
This processor finds vertices in a set of LCIO ReconstructedParticles (usually a jet) using the algorithm ZVTOP(ZVRES) described in D. Jackson, NIM A388:247-253, 1997 Also see (INSERT LINK TO ZVTOP DOC) To be used each ReconstructedParticle must have an attached LCIO Track. Note it is imperative that the tracks have well formed and preferably accurate covariance matrices in d0 and z0. If the covariances are too small fake or no vertices may be found. Too large and vertices will be combined.
The algorithm also requires an interaction point in the form of an LCIO Vertex or a manually set position and covariance.
The set of vertices forming a decay chain as output as set of LCIO Vertices and LCIO ReconstructedParticles for details see the interface documentation
For more details on algorihmic parameters see the ZVTOP paper.
- Parameters
-
JetRPCollectionName Name of the ReconstructedParticle collection that represents jets IPVertexCollectionName Name of the Vertex collection that contains the primary vertex (Optional) DecayChainRPTracksCollectionName Name of the ReconstructedParticle collection that represents tracks in output decay chains VertexCollection Name of the Vertex collection that contains found vertices DecayChainCollectionName Name of the ReconstructedParticle collection that holds RPs representing output decay chains ManualIPVertex If false then the primary vertex from VertexCollection is used ManualIPVertexPosition Manually set position of the primary vertex (cm) ManualIPVertexError Manually set error matrix of the primary vertex (cm) (lower symmetric) IPWeighting Weight of the IP in the Vertex Function JetWeightingEnergyScaling Scaling factor for Weight of the jet direction in the Vertex Function. Kalpha = Scaling * JetEnergy TwoTrackCut Chi Squared cut for making initial track pairs - chi squared of either track NOT sum TrackTrimCut Chi Squared cut for final trimming of tracks from vertices ResolverCut Cut to determine if two vertices are resolved OutputTrackChi2 If true the chi squared contributions of tracks to vertices is written to LCIO
Definition at line 64 of file ZVTOPZVRESProcessor.h.
The documentation for this class was generated from the following files:
