SiSpacePointFormation Package

Author

Maria.nosp@m..Jos.nosp@m.e.Cos.nosp@m.ta@c.nosp@m.ern.c.nosp@m.h (update of the original code from David Candlin)

Introduction

This package contains the algorithm to create Space Points for the Pixels and SCT detectors. For the Pixels it is just a transformation of classes from clusters to Space Points while for the SCT it combines the 1-dimensional information of two SCT clusters into a Space Point. This algorithm is used in the offline reconstruction.

Algorithm Overview

The SiSpacePointFormation package contains the following algorithms:

• SiTrackerSpacePointFinder: It retrieves all the Pixels and SCT clusters and creates the SpacePoints containers: one for Pixels and two for SCT non-overlapping SpacePoints. The overlapping SCT SpacePoints are saved in a different collection. Non-overlapping means that a SpacePoint is created from 2 clusters of the same module and overlapping when they are created from 2 clusters which are in different but overlapping modules.

The algorithm uses the classes SiElementPropertiesTable and SiElementProperties in order to access, for the SCT, the backside wafer of a given module and the neighbour ones from other modules.