7 research outputs found
Pattern Recognition and Event Reconstruction in Particle Physics Experiments
This report reviews methods of pattern recognition and event reconstruction
used in modern high energy physics experiments. After a brief introduction into
general concepts of particle detectors and statistical evaluation, different
approaches in global and local methods of track pattern recognition are
reviewed with their typical strengths and shortcomings. The emphasis is then
moved to methods which estimate the particle properties from the signals which
pattern recognition has associated. Finally, the global reconstruction of the
event is briefly addressed.Comment: 101 pages, 58 figure
Hg 5d and 6s: Multichannel quantum-defect analysis of experimental data
Schäfers F, Heckenkamp C, Müller M, Radojevic V, Heinzmann U. Hg 5d and 6s: Multichannel quantum-defect analysis of experimental data. Physical Review, A: Atomic, Molecular and Optical Physics. 1990;42(5):2603-2613.Experimental spin-polarization data for the Hg 6s Cooper minimum and dipole-transition amplitudes and phase-shift differences for photoionization of the Hg 5d and 6s shells (eight channels) in the photon-energy region from the 2D3/2 threshold up to 35 eV (kinetic energies from 0 to 20 eV) are presented and compared with new relativistic random-phase approximation calculations. The data were evaluated from an experimental data set, quantum mechanically complete, consisting of cross-section and photoelectron spin-polarization data. For the 5d subshells the results show strong interchannel coupling between the outgoing p and f continuum channels. The results for Hg 6s could be used for an independent determination of the photoelectron angular distribution parameter [Beta] in the Cooper-minimum region. This region is shown to be perturbed by numerous two-electron excitations, which might be a possible explanation for the controversy on its location