\section{Track\-Particle\-Fit\-Object.\-cc File Reference}
\label{TrackParticleFitObject_8cc}\index{Track\-Particle\-Fit\-Object.\-cc@{Track\-Particle\-Fit\-Object.\-cc}}


Implements class \doxyref{Track\-Particle\-Fit\-Object}{p.}{classTrackParticleFitObject} \doxyref{Track\-Particle\-Fit\-Object}{p.}{classTrackParticleFitObject} takes an L\-C\-I\-O track or trackstate (parameters \& covariance) as input. it knows about the 4-\/momentum and \char`\"{}decay plane\char`\"{} of the Track\-Particle\-Object \char`\"{}decay plane\char`\"{} is the plane defined by the I\-P and the tangent to the track at P\-C\-A At present it considers the track only at the P\-C\-A\-: i.\-e. the momentum/decay plane are considered only at the P\-C\-A, not at a general position along the helix this means it's no good for fitting (significantly) displaced vertices in which the tracks have bent significantly between the P\-C\-A and vertex positions this should be improved in a future update by including extra parameters (as was done for the original Track-\/based classes)  


{\ttfamily \#include \char`\"{}Track\-Particle\-Fit\-Object.\-h\char`\"{}}\\*
{\ttfamily \#include $<$cmath$>$}\\*
{\ttfamily \#include $<$cassert$>$}\\*
{\ttfamily \#include $<$iostream$>$}\\*
{\ttfamily \#include $<$iomanip$>$}\\*


\subsection{Detailed Description}
Implements class \doxyref{Track\-Particle\-Fit\-Object}{p.}{classTrackParticleFitObject} \doxyref{Track\-Particle\-Fit\-Object}{p.}{classTrackParticleFitObject} takes an L\-C\-I\-O track or trackstate (parameters \& covariance) as input. it knows about the 4-\/momentum and \char`\"{}decay plane\char`\"{} of the Track\-Particle\-Object \char`\"{}decay plane\char`\"{} is the plane defined by the I\-P and the tangent to the track at P\-C\-A At present it considers the track only at the P\-C\-A\-: i.\-e. the momentum/decay plane are considered only at the P\-C\-A, not at a general position along the helix this means it's no good for fitting (significantly) displaced vertices in which the tracks have bent significantly between the P\-C\-A and vertex positions this should be improved in a future update by including extra parameters (as was done for the original Track-\/based classes) 