The TrkKinematicVertexFitterUtils package

TrkKinematicVertexFitterUtils provides classes for constraints in vertex reconstruction.   For the time being it is meant to host the concrete types of kinematic constraints implemented under the Trk::IKinematicConstraint base class interface.

Each constraint class calculates a vector of values and a matrix of derivatives of the corresponding constraint equation at the expansion point provided by the user.

Class Overview

The TrkVertexKinematicFitterUtils package contains:

• Trk::MassConstraint - formulates the mass constraint in kinematic vertex fitting

The classes in this package (and any future additions) shall not extend any of the athena components, therefore the package follows the installed_library pattern.

Author

Maaike Limper

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