Rudolf Frühwirth

Univ.-Doz. Dipl.-Ing. Dr. Rudolf Frühwirth

Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften
Nikolsdorfer Gasse 18, 1050 Wien



Cross section of the future Belle II silicon vertex detector.

In order to extract the full physics information that is available in the experiments of particle, nuclear and atomic physics, statistical methods are essential, both in the design and in the analysis phase. At HEPHY, the algorithm and software development group led by Frühwirth has a long tradition in developing data analysis algorithms for particle physics experiments. In the past, the main lines of research were the development of robust and adaptive algorithms for the reconstruction of charged tracks and interaction vertices, including implementations in the analysis software of the CMS experiment and the ATLAS experiment. More recently, a novel method was developed for the geometrical adjustment (alignment) of large tracking detectors such as the silicon tracker of the CMS experiment.
A related method for estimating the amount of material in a tracking detector has been developed in the last two years. This is of particular relevance for the reconstruction of low-momentum tracks, for instance in the silicon vertex tracker of the Belle II experiment.
First results have been published. In parallel, pattern recognition studies in the upgraded tracker of the CMS experiment have been initiated. Some very preliminary results are available, but clearly much more work is needed in this direction.