All the classes parametrize the MultipleScattering in the tracker. It is used especially for the seed generation.
PixelRecoUtilities provide a lot of services related to the magnetic field.
MSLayer MSLayersAtAngle MSLayersKeeper MSLayersKeeperX0AtEta MSLayersKeeperX0Averaged MSLayersKeeperX0DetLayer MultipleScatteringGeometry MultipleScatteringParametrisation MultipleScatteringX0Data PixelRecoLineRZ PixelRecoPointRZ PixelRecoRange PixelRecoUtilities rangeIntersection rangesIntersect
Unknown
Unknown