\hypertarget{classZVTOPZVKINProcessor}{\subsection{Z\-V\-T\-O\-P\-Z\-V\-K\-I\-N\-Processor Class Reference}
\label{classZVTOPZVKINProcessor}\index{Z\-V\-T\-O\-P\-Z\-V\-K\-I\-N\-Processor@{Z\-V\-T\-O\-P\-Z\-V\-K\-I\-N\-Processor}}
}


Find vertices in a jet using kinematic Z\-V\-T\-O\-P-\/\-Z\-V\-K\-I\-N algorithm.  




{\ttfamily \#include $<$Z\-V\-T\-O\-P\-Z\-V\-K\-I\-N\-Processor.\-h$>$}



Inherits Processor.



Collaboration diagram for Z\-V\-T\-O\-P\-Z\-V\-K\-I\-N\-Processor\-:


\subsubsection{Detailed Description}
Find vertices in a jet using kinematic Z\-V\-T\-O\-P-\/\-Z\-V\-K\-I\-N algorithm. 

\subparagraph*{Input}

\begin{TabularC}{3}
\hline
Name &Type &Represents \\\cline{1-3}
Jet\-R\-P\-Collection\-Name &Reconstructed\-Particle &Jets to be Vertexed (eg from Satoru\-Jet\-Finder\-Processor \\\cline{1-3}
I\-P\-Vertex\-Collection\-Name &Vertex &Event Interaction Point (eg from \hyperlink{classPerEventIPFitterProcessor}{Per\-Event\-I\-P\-Fitter\-Processor}) -\/ optional can be manually specified \\\cline{1-3}
\end{TabularC}
\subparagraph*{Output}

\begin{TabularC}{3}
\hline
Name &Type &Represents \\\cline{1-3}
Decay\-Chain\-Collection\-Name &Reconstructed\-Particle &Decay Chains (set of found vertices) \\\cline{1-3}
Vertex\-Collection &Vertex &Found vertices \\\cline{1-3}
Decay\-Chain\-R\-P\-Tracks\-Collection\-Name &Reconstructed\-Particle &Tracks used in Decay Chains and found vertices \\\cline{1-3}
\end{TabularC}
\subparagraph*{Description}

This processor finds vertices in a set of L\-C\-I\-O Reconstructed\-Particles (usually a jet) using the algorithm Z\-V\-T\-O\-P(\-Z\-V\-K\-I\-N) Also see (I\-N\-S\-E\-R\-T L\-I\-N\-K T\-O Z\-V\-T\-O\-P D\-O\-C) To be used each Reconstructed\-Particle must have an attached L\-C\-I\-O 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.\par
 The algorithm also requires an interaction point in the form of an L\-C\-I\-O Vertex or a manually set position and covariance. -\/ N\-O\-T\-E Only an ip at the origin (0,0,0) is supported as the ghosttrack has that origin, this will hopefully be upgraded in a future release.\par
 The set of vertices forming a decay chain as output as set of L\-C\-I\-O Vertices and L\-C\-I\-O Reconstructed\-Particles for details see \hyperlink{LCIO}{the interface documentation}\par
 For more details on algorihmic parameters see the Z\-V\-K\-I\-N paper \char`\"{}zvkin.\-ps\char`\"{} in the doc directory.

\begin{DoxyAuthor}{Author}
Ben Jeffery (\href{mailto:b.jeffery1@physics.ox.ac.uk}{\tt b.\-jeffery1@physics.\-ox.\-ac.\-uk})
\end{DoxyAuthor}

\begin{DoxyParams}{Parameters}
{\em Jet\-R\-P\-Collection} & Name of the Reconstructed\-Particle collection that represents jets \\
\hline
{\em I\-P\-Vertex\-Collection} & Name of the Vertex collection that contains the primary vertex (Optional) \\
\hline
{\em Decay\-Chain\-R\-P\-Tracks\-Collection\-Name} & Name of the Reconstructed\-Particle collection that represents tracks in output decay chains \\
\hline
{\em Vertex\-Collection} & Name of the Vertex collection that contains found vertices \\
\hline
{\em Decay\-Chain\-Collection\-Name} & Name of the Reconstructed\-Particle collection that holds R\-Ps representing output decay chains \\
\hline
{\em Manual\-I\-P\-Vertex} & If false then the primary vertex from Vertex\-Collection is used \\
\hline
{\em Manual\-I\-P\-Vertex\-Position} & Manually set position of the primary vertex (cm) -\/ non origin I\-P not yet fully supported \\
\hline
{\em Manual\-I\-P\-Vertex\-Error} & Manually set error matrix of the primary vertex (cm) (lower symmetric) \\
\hline
{\em Minimum\-Probability} & If a vertex candidate has a probability below this it will not be considered -\/ lower value results in more merging and lower vertex multiplicity \\
\hline
{\em Initial\-Ghost\-Width} & Width in cm of the ghost inital ghosttrack also the smallest width it is allowed to have \\
\hline
{\em Max\-Chi2\-Allowed} & The ghost track is widened until all forward jet tracks have a chi squared lower than this value \\
\hline
{\em Output\-Track\-Chi2} & If true the chi squared contributions of tracks to vertices is written to L\-C\-I\-O \\
\hline
\end{DoxyParams}


The documentation for this class was generated from the following file\-:\begin{DoxyCompactItemize}
\item 
Z\-V\-T\-O\-P\-Z\-V\-K\-I\-N\-Processor.\-h\end{DoxyCompactItemize}
