ATLAS Offline Software
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#include <LinearizedTrack.h>
Caching class to store the parameters of expansion of the measurement equation in the vicinity of the vertex.
See [1] Billoir and Qian et al. NIM A311 (1992) 139-150 and [2] R, Fruehwirth et al. Comp. Phys. Comm 96(1996) 189-208 for reference.
The actiual way of expansion depends on the factory used. We assume that by default a FullPerigeeLinearized track factory, implementing an exact solution is used.
This is a replacement of a former PerigeeLinearizedTrack class