InDetTruthAlgs Package

Author

Maria.nosp@m..Jos.nosp@m.e.Cos.nosp@m.ta@c.nosp@m.ern.c.nosp@m.h, Andre.nosp@m.as.W.nosp@m.ildau.nosp@m.er@c.nosp@m.ern.c.nosp@m.h

Introduction

This package contains the algorithms to create the truth objects and the maps objects that connect the truth and the reconstructed objects.

For each of the reconstructed objects (PrepRawData, SpacePoint and Track) there is a truth object associated with it. The truth object is meant to point to the source that contributed the most to the creation of that object, where source here stands for either noise or a generated particle. It contains then a HepMcParticleLink object (dominant source) and a probability to indicate what was the contribution of this source to the creation of the reconstructed object.

Note that a decision is taken in the algorithms filling the truth since the information of all the other sources that also contribute is lost.

Algorithm Overview

The InDetTruthAlgs package contains the following algorithms:

• PRD_MultiTruthMaker: Creates multimaps of PrepRawData (PRD_MultiTruthCollection) to their MC particles.
• InDetDetailedTrackTruthMaker: For each reconstructed Track it creates corresponding DetailedTrackTruth objects and fills DetailedTrackTruthCollection. It is based on the truth of all the PrepRawData objects contained in the Track.