DF Definitions of Tracking Elements

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Below are definitions of the structures used in the clas12 dc reconstructions.

Hits

Hit.java

The basic building block of the other structures used in the reconstruction, Hits are simply a representation of a drift chamber wire interaction. It stores all of the relevant information for identifying a wire:

  • Sector:
  • Superlayer
  • Layer
  • Wire

It alos stores some information regarding the interaction itself:

  • TDC
  • Id
  • cellSize
  • DocaErr

FittedHit.java

A B
C D

Clusters

Segments

Crosses

Tracks