History: Track finding and fitting

The determination of the charged particle momentum in HEP experiments requires a fit of a parametrization to the points measured in a tracking chamber. Various effects can result in deviations to the ideal helix in the uniform field of a solenoid. One effect is multiple scattering, which cuses a random walk of the particle and affects especially low-momwentum tracks and very accurate measurements. The standard method with a weight matrix, which includes the multiple scattering effects, requires a solution time proportional to the third power of N, the number of measured points, and has other disadvantages.


Tracking methods overview, Hermes Meeting, Zeuthen, March 26, 2003

Central track finding and reconstruction in the H1 detector, March 31, 2003, DESY Hörsaal