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V0Finder processor identify neutral vertices originating. More...
Classes | |
| class | V0Finder |
V0Finder processor identify neutral vertices originating.
/** V0Finder Processor
V0Finder processor identify neutral vertices originating
from photon conversions and decays of K0S and Lamda0
Processor requires collection of tracks. The name of the collection
is specified by the processor parameter "TrackCollection".
If no collection with the specified name exist in event
processor takes no action
Processor produces LCIO collections of the reconstructed particles,
and vertices, containing information on the reconstructed neutral vertices
Position of the vertex is accessed through the LCIO object VERTEX.
Four-vector of the vertex is stored in the object RECONSTRUCTEDPARTICLE
Type of the VERTEX is accessed through the method ReconstructedParticle::getType()
The convential codes are adopted to specify type of the neutral vertices
(22 - photon conversion, 310 - K0S, 3122 - Lamda0)
| TrackCollection | name of the input Track collection (default value LDCTracks) |
| RecoParticleCollection | name of the output collection of the ReconstructedParticles (default value V0RecoParticles) |
| VertexCollection | name of the output collection of Vertices (default value V0Vertices) |
| CutOnRadius | cut on the vertex radius vector. If vertex radius sqrt(x**2+y**2) is less than cut value, the candidate vertex is discarded. In this case two tracks are assumed to originate from the primary interaction vertex. (default value 6.0 mm) |
| CutOnTrkDistance | cut on the distance between tracks constituting neutral vertex If the 3D distance between two tracks with opposite charge is less that cut value, the two tracks are regarded as constituting neutral vertex (default value 1.5 mm) |
| MassRangeGamma | maximal allowed deviation in mass for gamma hypothesis (default value 0.01 GeV) |
| MassRangeK0S | maximal allowed deviation in mass for K0S hypothesis (default value 0.01 GeV) |
| MassRangeL0 | maximal allowed deviation in mass for L0 hypothesis (default value 0.008 GeV) |
1.8.5