... orientation¹

Because we cannot know a priori which horizontal and vertical hits were produced by the same particle, we wait until the road-finding procedure to combine the horizontal and vertical hits.

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... boundaries.²

A cluster may potentially contain more than one set of contiguous non-firing two-packs.

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... roads³

ghost roads are combinations of hits that do not correspond to any of the particles that traversed the Muon Arm.

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... plane⁴

The z=0 plane, which contains the nominal interaction point at (0,0,0) and has a normal parallel to the experiment Z axis.

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... track⁵

This definition excludes products of decays (apart from resonances, which are not handled by GEANT), and products of secondary interactions.

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... track.⁶

The existing requirement that all clusters in a road (horizontal and vertical) have the same panel number helps somewhat.

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